Collapse REBOOT_SKIP_TESTS into GCE_DEFAULT_SKIP_TESTS, and remove GCE_SOAK_CONTINUOUS_SKIP_TESTS as redundant (see notes)

Label flaky e2es with [Flaky] & slow tests with [Slow]

Stop munger produce the link to a release version doc if it doesn't exit in the release branch

Bump cadvisor to fix interface stats bugs & improve performance

Copy edits for typos

Implement conflict detection in strategic merge patch

Fix timeout in etcdwatcher tests

Revert "Enable logs generation rate checking in scalability tests"

Fix race in watch tests - attempt 3

Fix e2e tests broken in #17865

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Switch to versioned ListOptions in server.

Close watchers in tests

Fix density test

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Fix race in EtcdWatcher

1. Name default scheduler with name `kube-scheduler`
2. The default scheduler only schedules the pods meeting the following condition:
	- the pod has no annotation "scheduler.alpha.kubernetes.io/name: <scheduler-name>"
	- the pod has annotation "scheduler.alpha.kubernetes.io/name: kube-scheduler"

update gofmt

update according to @david's review

run hack/test-integration.sh, hack/test-go.sh and local e2e.test

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generating a link to it.