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Switch pod eviction client from v1alpha1 to v1beta

Generated client 1.5 has a function to evict a pod. The function uses v1alpha1.Eviction object instead of v1beta1. This pr changes the api version that is being used.

cc: @davidopp @caesarxuchao

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Set version and job-version in started.json/metadata.json

Ref https://github.com/kubernetes/test-infra/issues/1032

We can delete version once all CI jobs are migrated to bootstrap

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fix issue in reconstruct volume data when kubelet restarts

During state reconstruction when kubelet restarts, outerVolueSpecName
cannot be recovered by scanning the disk directories. But this
information is used by volume manager to check whether pod's volume is
mounted or not. There are two possible cases:
1. pod is not deleted during kubelet restarts so that desired state
should have the information. reconciler.updateState() will use this
inforamtion to update.
2. pod is deleted during this period, reconciler has to use
InnerVolumeSpecName, but it should be ok since this information will not
be used for volume cleanup (umount)

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More unittests for HPA.

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Federation test util fix - 1

* Make nil and empty map equivalent when testing ObjectMeta equivalence
* Add a function that waits for a particular content inside federated store

cc: @nikhiljindal @madhusudancs

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Improve quota performance for pvc by using shared informer

This avoids a list call for each namespace in the resource quota controller when syncing quota.

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Do not emit event for AlreadyExists errors

Fixes https://github.com/kubernetes/kubernetes/issues/36598 also reduced the clutter of events since the AlreadyExists error is a common error (may be a slow rs cache or a fast resync of the deployment that causes it apart from hash collisions)

@kubernetes/deployment

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Ensure health check exists before creating target pool

We already couple health check deletion with target pool deletion in deleteTargetPools, do the inverse in createTargetPools. See https://github.com/kubernetes/kubernetes/issues/35282#issuecomment-259317589 for why this is necessary. Fixes https://github.com/kubernetes/kubernetes/issues/35282, but the test won't go green till I relieve quota on the project.

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Node Conformance & E2E: Get node name from node object.

This PR changes the node e2e test framework to get node name from apiserver instead of test flags.

When a user tried out the node conformance test, he found that node conformance test will not work properly if kubelet is started with `hostname-override`.

The reason is that node conformance test is using [the default node name - `os.Hostname`](https://github.com/kubernetes/kubernetes/blob/master/test/e2e_node/e2e_node_suite_test.go#L124), which may be different from `hostname-override`. This will cause test pods not scheduled, and eventually test timeout.

We can expose a flag from node conformance test, and let user set node name themselves if they are using `hostname-override` on kubelet. However, let the framework automatically detect it from apiserver is more user friendly.

/cc @kubernetes/sig-node 
This PR 1) only changes node e2e test framework; 2) fixes a problem in node conformance test which is a 1.5 feature. @saad-ali Can we have this in 1.5?

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README: stop linking to a 18 month old version

We are proud of the v1.0 release but lets give users context on the date
it was released and not drive them to the actual release since
they should be using the latest release instead.

Automatic merge from submit-queue

Expand documentation and TODOs in a few packages

I was reading through unfamiliar code and mostly added TODOs and expanded and clarified documentations.

There are a couple of things that are real code changes:
- Removed some unused constants
- Changed `workqueue.Parallize` to clamp the number of worker goroutines to the number of items to be processed.
- Added another unit test to `workqueue.queue`.  I thought I found a bug (I was wrong) and wrote a unit test to isolate.  I figure the extra test is worth keeping.

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CRI: general grammar/spelling/consistency cleanup

No semantic changes, but a lot of shuffling of docstrings to make things
more consistent. In particular, standardise on the zeroth-article (i.e.
prefer `// Version` to `// The version`) and ending all docstrings with
periods.


(This knowingly conflicts with #36446 and intentionally omits changing the
Annotations field - I'll rebase this or that respectively as necessary.)

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Ensure proper serialization of updates and creates in federation test watcher

Fix for finalizer test problems. The issue there was that the updates were coming out of order. It was caused by firing updates in new goroutines in test watcher. The proper solution is to order them in a queue and fire in order on a single goroutine.

Ref: https://github.com/kubernetes/kubernetes/issues/36473#issuecomment-259605870

cc: @nikhiljindal @madhusudancs

During state reconstruction when kubelet restarts, outerVolueSpecName
cannot be recovered by scanning the disk directories. But this
information is used by volume manager to check whether pod's volume is
mounted or not. There are two possible cases:
1. pod is not deleted during kubelet restarts so that desired state
should have the information. reconciler.updateState() will use this
inforamtion to update.
2. pod is deleted during this period, reconciler has to use
InnerVolumeSpecName, but it should be ok since this information will not
be used for volume cleanup (umount)

Automatic merge from submit-queue

Fix wrong comparison var in e2e_node density test

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Add support for SourceIP preservation in Azure LBs

@thockin @colemickens now that we are setting DSR for Azure LBs this should "just work"

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Fix getting cgroup pids

Fixes https://github.com/kubernetes/kubernetes/issues/35214, https://github.com/kubernetes/kubernetes/issues/33232

Verified manually, but I didn't have time to run all the e2e's yet (will check it in the morning).

This should be cherry-picked into 1.4, and merged into 1.5 (/cc @saad-ali )

```release-note
Fix fetching pids running in a cgroup, which caused problems with OOM score adjustments & setting the /system cgroup ("misc" in the summary API).
```

/cc @kubernetes/sig-node

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Wait for deployment in the storage in federated deployment controller test

cc: @nikhiljindal

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bump golang to 1.7.3

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**What this PR does / why we need it**: bumps the go version to 1.7.3

**Which issue this PR fixes** _(optional, in `fixes #<issue number>(, #<issue_number>, ...)` format, will close that issue when PR gets merged)_: fixes #

**Special notes for your reviewer**:

**Release note**:

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Update https-nginx example

Update how to edit the configmap. Since we are not going to support `kubeectl replace configmap cmName --from-file=filename` in `v1.5`.
And update the `inotifywait` command.

Fixes: #36489

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Add dnsmasq-metrics to the standard DNS pod

We are proud of the v1.0 release but lets give users context on the date
it was released and necessarily drive them to the actual release since
they should be using the latest release instead.

Automatic merge from submit-queue

Do not handle AlreadyExists errors yet

Until we fix https://github.com/kubernetes/kubernetes/issues/29735 (use a new hashing algo) we should not handle AlreadyExists (was added recently in the perma-failed PR).

@kubernetes/deployment

Automatic merge from submit-queue

Update staging client-go

Executed commands:
```
git fetch --all
git merge upstream/master
godep restore
./hack/update-staging-client-go.sh
```
cc: @caesarxuchao @lavalamp