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kubele: add RSS memroy to the summary API

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Fix valid CI version regex in parse_and_validate_release_version().

Ref: #23759
cc @ihmccreery 

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examples/guestbook/php-redis: don't reopen stdio fds

/etc/apache2/apache2.conf was configured to log in this way:
> ErrorLog /proc/self/fd/2
> CustomLog /proc/self/fd/1 combined

This causes apache to reopen the already-opened fds. It works fine when
the file descriptors are pipes or ttys but it fails when they are Unix
sockets because sockets cannot be opened with the open() syscall. The
issue happens when apache is connected to systemd-journald, like in the
rkt container run-time.

This patch uses "cat" to directly write to the stdio fds without
reopening them. apache2.conf now looks like:
> ErrorLog "|$/bin/cat 1>&2"
> CustomLog "|/bin/cat" combined

It works both with Docker and rkt (tested with and without
--interactive).

Symptoms:
> [ 2673.478868] apache2-foreground[4]: (6)No such device or address:
> AH00091: apache2: could not open error log file /proc/self/fd/2.

See also: https://github.com/coreos/rkt/issues/2300

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/cc @sjpotter @yifan-gu @jonboulle

Remove "dirty workspace" check in e2e-runner.sh

Run kubernetes-e2e-g[ck]e-flaky inside Docker

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kube-scheduler: cleanup duplicate GetAlgorithmProvider()

See [here](https://github.com/kubernetes/kubernetes/blob/ae88f08af09b8e721913544dcc2afdc31f98635e/plugin/pkg/scheduler/factory/factory.go#L177-L180).
The check is duplicate since CreateFromProvider will also do it.

Fix upgrade jobs again

Automatic merge from submit-queue

Add flow control pkg

minor fix ref #15634
Refactor pkg names in back off related files

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Make kube2sky and skydns docker images cross-platform

ARM tracking issue: #17981
Continues on: #19216

Make it possible to create `kube2sky` and `skydns` docker images for ARM and other architectures too
Build in a container, so `golang` isn't a dependency
I've preserved the original default behaviour:
 - `skydns`: It just compiles with go on host
 - `kube2sky`: Build an image

@brendandburns @dchen1107 @ArtfulCoder @thockin @fgrzadkowski

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Minor doc edits to development.md 

Noted a few small clarity issues going through the development guide and while it mentioned local builds, it was missing instructions for building on a local go developer environment.  
Signed-off-by: mikebrow <brownwm@us.ibm.com>

Small improvements in conversion generator

Implement a simpler unversioned.Time serialization

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Update hack/test-cmd.sh to use tagged, gcr.io images

Migrate hack/test-cmd.sh and related test data to use tagged, gcr.io versions of the images for #13288 and #20836

Automatic merge from submit-queue

Allowing type object in kubectl swagger validation

Allowing `"type": "object"` in kubectl swagger validation.

We will cherrypick this in 1.2
This allows 1.2 kubectl to work with 1.3 api server which will use `"type":"object"` instead of `"type":"any"`.
Ref https://github.com/kubernetes/kubernetes/issues/4700#issuecomment-194719759

cc @bgrant0607 

Externalize immortal namespaces

include error in the fail msg

Fix TerminationMessagePath

Add KUBERNETES_RELEASE option to get-kube.sh

keep deprecated flag stage1-image with rkt

Force all other e2e jobs to run on master.

set KillMode for kubelet to process, fix for #13511

Create test job against release/latest on GKE

Increase *-slow workflow timeouts to 150 as avg runtime is 50m

Remove retries from most oidc tests.

Add loging to the recently recycled PV section

fix typo (in godoc)

Retry the cloudsdk gsutil copy.

Disable autoscaling Jenkins job.

Mark services test slow.

Fixed typo: kuberntes -> kubernetes

Fix travis go version.

Trusty: Do not create the docker-daemon cgroup

Only keep 7 days' worth of logs for kubernetes-update-jenkins-jobs