Adds changelog for kubedns v1.9

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Node E2E: Update ubuntu image to e2e-node-ubuntu-trusty-docker10-v2-image.

@sjenning Hopefully this will unblock  https://github.com/kubernetes/kubernetes/pull/32577.

I built a new ubuntu trusty image with docker 10 - `e2e-node-ubuntu-trusty-docker10-v2-image`. The kernel version of the new ubuntu image is `4.4.0-47-generic`.

@dchen1107 
/cc @kubernetes/sig-node 

Mark v1.5 because this unblocks a v1.5 feature https://github.com/kubernetes/kubernetes/pull/32577.

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Change stickyMaxAge from seconds to minutes, fixes issue #35677

**What this PR does / why we need it**: Increases the service sessionAfinity time from 180 seconds to 180 minutes for proxy mode iptables which was a bug introduced in a refactor.

**Which issue this PR fixes**: fixes #35677

**Special notes for your reviewer**: 

**Release note**:

``` release-note
Fixed wrong service sessionAffinity stickiness time from 180 sec to 180 minutes in proxy mode iptables.
```

Since there is no test for the sessionAffinity feature at the moment I wanted to create one but I don't know how.

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E2E tests cleanup: regexp for master replica in a separate function

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Kubemark master components run by supervisord. Try 2.

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HA master, fixed replica name when creating load balancer.

HA master, fixed replica name when creating load balancer. Was broken when replica
w/o suffix was no longer in the cluster.

E2E tests cleanup: moved generation of regexp for master replica to a separate function.

HA master, fixed replica name when creating load balancer. Was broken when replica
w/o suffix is no longer in the cluster.

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Fixed e2e tests for HA master.

Set of fixes that allows HA master e2e tests to pass for removal/addition master replicas.

The summary of changes:
- fixed host name in etcd certs,
- added cluster validation after kube-down,
- fixed the number of master replicas in cluster validation,
- made MULTIZONE=true required for HA master deployments, ensured we correctly handle MULTIZONE=true when user wants to create HA master but not kubelets in multiple zones,
- extended verification of master replicas in HA master e2e tests.

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Bump version of the fluentd-gcp image

Fix https://github.com/kubernetes/kubernetes/issues/37107

Follow-up of https://github.com/kubernetes/kubernetes/pull/37123

@piosz

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test: extend time for a condition to appear in status

Fixes https://github.com/kubernetes/kubernetes/issues/36574

Set of fixes that allows HA master e2e tests to pass for removal/addition of master replicas.

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Remove Feature label from OutOfDisk e2e test

Fix https://github.com/kubernetes/kubernetes/issues/35722

Related to https://github.com/kubernetes/kubernetes/pull/35551 and https://github.com/kubernetes/kubernetes/pull/36225

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Add more logging around Pod deletion

After this PR we'll have at least V(2) level log near all Pod deletions.

@saad-ali - this is required by GKE to help with diagnosing possible problem.

cc @dchen1107 @wojtek-t

This reverts commit a4ee3ed0, reversing
changes made to 8c90bc35.

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Check sysfs Type instead of Device

Some distribution uses "none" device to mount "sysfs" type, so kube-proxy needs to list mount points and check "types" instead of "device".

fixes #37183 

```release-note
Change sysfs mountpoint tests from Device to Type to be able to find sysfs mountpoint on "none" device
```

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Test flake: ignore dig failure; wait until timeout

The intent of this test was to continue trying until the timeout has
been reached. The extra assertion makes the test fail early when it
should not.

https://github.com/kubernetes/kubernetes/issues/37144

fix 37114

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Update the timeout in CLOSE_WAIT e2e test

I see some test flakes due to the timeout being too strict,
updating to a larger value.

Adding tail -n 1, it looks like there may be leftover state for other
runs. We really only care about one of the CLOSE_WAIT entries.

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Register api.DeleteOptions for internal batch group

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**What this PR does / why we need it**: Registers api.DeleteOptions for internal batch group

**Which issue this PR fixes**: fixes #36806

**Release note**:
<!--  Steps to write your release note:
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2. Enter your extended release note in the below block; leaving it blank means using the PR title as the release note. If no release note is required, just write `NONE`. 
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```release-note
Register api.DeleteOptions for internal batch group
Register api.DeleteOptions for internal autoscaling group
```

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Document config options for gcp auth provider plugin.

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**What this PR does / why we need it**:

Adds source documentation for the gcp auth provider plugin config options. Shouldn't have to read through the code to understand what the options and their defaults are.


**Release note**:
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Include serial port output in GCP log-dump

This should help us debug reboot failures e.g. https://github.com/kubernetes/kubernetes/issues/33882
Also useful for OOM-kill investigation.

/cc @dchen1107

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Revert "Avoid hard-coding list of Node Conditions"

* we don't know how other API consumers are using node conditions (there was no prior expectation that the scheduler would block on custom conditions)
* not all conditions map directly to schedulability (e.g. `MemoryPressure`/`DiskPressure`)
* not all conditions use True to mean "unschedulable" (e.g. `Ready`)

This reverts commit 511b2eca to avoid breaking existing API users and to avoid constraining future uses of the node conditions API

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Test case for scalling down before scale up finished

Verifies that current pet (one which was created last by scale up action)
will enter running before scale down will take place

related: #30082

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Fix a link in api doc

Remove an extra symbol `, it breaks a link in api doc.
cc @caesarxuchao , thanks!

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Update Docker for Mac installation link

**What this PR does / why we need it**:

Fixes broken obsolete link about Docker for Mac installation.

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Read all resources for finalization and gc, not just preferred

Fixes #31481. 

Currently when starting namespace controller or garbage collector we only gather preferred version resources, which in case of multiple versions (you guessed it `batch/v2alpha1.CronJobs` again) isn't sufficient. This PR adds additional method which actually retrieves all resources from all versions and works on them.

@kubernetes/sig-api-machinery ptal

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[Federation][join-flags] Add flags for cluster context and secret names while joining clusters to federation.

Vast majority of cluster contexts are not RFC 1123 subdomains. Since
cluster and secret names for the API objects are derived from the
cluster context name, there is no way for users to join clusters
with such context names to federation, unless they modify the context
name in their kubeconfigs itself. That's a lot of inconvenience and
entirely goes against the goal and beats the purpose of the `kubefed`
tool. So we are providing these flags to allow users to override these
values.

Also, since users register their clusters with federation, it is makes
sense in terms of user experience to make the cluster name a positional
argument because that feels more natural. Also, specifying cluster name
in the join command as a mandatory positional argument make
`kubefed join` consistent with `kubefed unjoin`. This also means
`--cluster-context` is now made a flag and defaults to cluster name if
unspecified.

`--secret-name` also defaults to the cluster name if unspecified.

Fixes: Issue #35954

cc @kubernetes/sig-cluster-federation @quinton-hoole @irfanurrehman

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Revert "Use Gid when provisioning Gluster Volumes."

On further inspection the design in #35460 was not secure enough.  This PR reverts the change. 

This reverts commit 7a0d219d.

I see some test flakes due to the timeout being too strict,
updating to a larger value.

Adding tail -n 1, it looks like there may be leftover state for other
runs. We really only care about one of the CLOSE_WAIT entries.

This reverts commit 511b2eca.

The intent of this test was to continue trying until the timeout has
been reached. The extra assertion makes the test fail early when it
should not.

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Validate pet set scale up/down order

This change implements test cases to validate that:
- scale up will be done in order
- scale down in reverse order
- if any of the pets will be unhealthy, scale up/down will halt

related: https://github.com/kubernetes/kubernetes/issues/30082

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Filter out non-RestartAlways mirror pod in restart test.

Fixes #37202.

> A quick fix is to filter out non-RestartAlways pods. Because either RestartNever and RestartOnFailure pods could succeed, and we can not deal with terminated mirror pods very well now.

@yujuhong @gmarek 
/cc @kubernetes/sig-node

Automatic merge from submit-queue

Fields with omitempty tag should still be considered as optional

We've added an "+optional" tag while ago for optional fields. Before that OpenAPI spec generated assumed all fields with "omitempty" in their json tags are optional. This should be still the case (as well as +optional tag) until these two things happen:

- We update all documentation asking developers to use +optional (My bad, I should have added this after the +optional PR)
- We fix swagger 1.2 spec generator to use +optional instead of omitempty.

Fixes #37149