make integration/verify script look for k8s under GOPATH

Surface selected pod RuntimeHandler in Kubelet logs

Update to go1.11.4

e2e: Show the caller's stack for Skipf() instead of the local one

Add an impersonation test case to the audit E2E test

tolerate existing subpath on pod update when feature is disabled

Eclass task 1: clean up old code

Roll forward #71456 with a check whether INSTANCE_GROUPS is empty.

Fix race condition when joining nodes

This reverts commit 047aa254.

DNS service ordering for addon manager

kube-proxy/IPVS Improve service deletion

Fix comment error of 'cpuManagerStateFileName'

bump metadata-proxy to v0.1.11, update tests & test image

Co-authored-by: Harry Zhang <resouer@gmail.com>
Co-authored-by: Wang Qingcan <wangqingcan@baidu.com>

consolidate node deletion logic between kube-controller-manager and cloud-controller-manager

kubeadm: fix nil check in join config creation

Add some exception handling of Preempt

Switch sample apiserver internalversion informer to external

Promote NodeLease to Beta and enable by default

fix race condition when attach azure disk in vmss

fix gofmt issue

Minor cleanup in scheduler/PriorityQueue