HorizontalPodAutoscaler and Scale subresource APIs graduated to beta.

let kubectl annotate use patch instead of replace

let kubectl label use PATCH instead of PUT

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HorizontalPodAutoscaler API: removal of ResourceConsumption target, introduction of CPU request utilization & other cleanups.

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Enable extensions/v1beta1 by default and allow runtimeConfig to support enabling/disabling specific resources

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Add get-build to our packaged test files for upgrade-tests

refactor "experimental" to "extensions" in documents

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Move job to generalized label selector

Add e2e test for pod garbage collection

Improve the error handling when creating/delete GCE IPs in e2e tests.

refactor kubectl logs to be composeable

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Extract latency test so it can be run separately from density E2E

e2e: disable component killing/restarting tests in the soak cluster

Remove all _test.go files from Godeps

This fixes #15649

Temp. skip exec+proxy e2e test