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Fix `kubectl create configmap` help

Resurrection of #23290

cc @bgrant0607 @janetkuo @ncdc

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Convert internal types to use exact precision integers

This makes conversion more suitable for future optimizations, and we need to stop pretending for some of our internal types that the width of the int doesn't matter.

@wojtek-t

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Fix detect-node-names to not error out if there are no nodes

Fixes #21564.

Teardown was not working correctly in rare cases because `detect-node-names` was failing before any of the actual cleanup was run. I'm pretty sure the issue was that there was an instance group, but no instances in the instance group, so we bailed out when we tried to expand the bash array.

This PR adds a guard so we don't bail if the array is empty.

cc @jlowdermilk @spxtr 

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GCI: Update the command to get the image

When we announced public GCI, we used the project google-containers to host GCI release images. However, later we encountered a licence issue and the administrators of google-containers project decided to remove this project from gcloud commands. According, we should list GCI images with the flag "--project google-containers". But the same image is listed twice during this transient period. This PR updates the code of getting the GCI image, which works during the transient period and after the google-containers project change finishes.

@roberthbailey @dchen1107 @zmerlynn please review it.

cc/ @wonderfly @fabioy FYI

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Remove metadata-cache.

It's moving to kubernetes/test-infra. See https://github.com/kubernetes/test-infra/pull/2.

Having internal and external integer types being different hides
potential conversion problems. Propagate that out further (which will
also allow us to better optimize conversion).

Remove "generic" from the help text, as that was an inadvertent carry-over from `kubectl create
secret generic`.

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Disable coreos nodes from node e2e due to issues with ssh on coreos.

Fixes #24423

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more explicit requirements for pre-commit hook

I don't know if using the pre-commit hook is still a best-practice, but godep and etcd are requirements for it to succeed.

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Refactored SeedProvider and Updated Docker

This is a redo of the last PR that I munged 😄 

- fixed maven build folder structure
- updated build to C* 3.4
- refactored Seed Provider - improved error handling, updated default SeedProvider code
- added start of unit tests.  Not as comprehensive as I would like
- updated docker image to debian:jessie
- installed openjdk 8
- added some docker fu to make the image smaller
- updated docker to C* 3.4 and update yaml
- updated README content.  Added a section about the docker, and the SeedProvider

Have not had a chance to test the docker on k8s, because I do not have a local docker repo.

NOTE: someone needs to push the docker image into the google repo. Not sure what the process is ...  I will submit another PR request with changes to the yaml files.

Signed-off-by: Vishnu kannan <vishnuk@google.com>

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[Networking] [E2E]  n-to-1 iperf client->server throughput benchmarking 

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Port-forward: use out and error streams instead of glog

Switches use of glog with command out and error streams

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Provide flags to use etcd3 backed storage

ref: #24405

What's in this PR?
- Add a new flag "storage-backend" to choose "etcd2" or "etcd3". By default (i.e. empty), it's "etcd2".
- Take out etcd config code into a standalone package and let it create etcd2 or etcd3 storage backend given user input.

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Support Close() in streaming decoder

[This would be useful for changes in clients to support protobufs.]

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Make all defaulters public

Will allow for generating direct accessors in conversion code instead of using reflection.

@wojtek-t

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Fix zone in kubemark-100

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Promote Pod Hostname & Subdomain to fields (were annotations)

Deprecating the podHostName, subdomain and PodHostnames annotations and created corresponding new fields for them on PodSpec and Endpoints types.

Annotation doc: #22564
Annotation code: #20688

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Create OWNERS for jenkins data

Assigne jenkins changes to more precise owners.

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Slightly more effective conversion test (better variety)

Exercises more code paths for debugging memory allocations.

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Add godoc for some kubelet funcs

Chipping away at that old boulder

@kubernetes/sig-node

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Move kubemark-100 to us-central

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Fix test-history. RE objects aren't callable.

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Validate deletion timestamp doesn't change on update

Fixes https://github.com/kubernetes/kubernetes/issues/24828

Refactored KubernetesSeedProvider and added unit tests.  Updated Docker image and bumped Cassandra version

Preparing to generate direct defaulter access.

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Add utility for determining qos of a pod

@vishh - per slack chat.