neolit123: kubeadm: cleanup the "master" taint on CP nodes during upgrade

JobBuild
110095
05-17 16:29
ddd046f3
05-17 16:28
pull-kubernetes-conformance-kind-ga-only-parallel 1526600285764456448
pull-kubernetes-conformance-kind-ipv6-parallel 1526600285462466560
pull-kubernetes-dependencies 1526600285508603904
pull-kubernetes-e2e-gce-100-performance 1526600285911257088
pull-kubernetes-e2e-gce-ubuntu-containerd 1526600285554741248
pull-kubernetes-e2e-kind 1526600285659598848
pull-kubernetes-e2e-kind-ipv6 1526600285705736192
pull-kubernetes-integration 1526600285617655808
pull-kubernetes-node-e2e-containerd 1526600285848342528
pull-kubernetes-typecheck 1526600286284550144
pull-kubernetes-unit 1526600285806399488
pull-kubernetes-verify 1526600287945494528
pull-kubernetes-verify-govet-levee 1526600287106633728