prksu: kubectl: kubectl version better error message

JobBuild
047ef3f6
01-19 10:27
pull-kubernetes-bazel-build 70401
pull-kubernetes-bazel-test 73105
pull-kubernetes-e2e-gce 65643
pull-kubernetes-e2e-gce-100-performance 32070
pull-kubernetes-e2e-kops-aws 119948
pull-kubernetes-godeps 1323
pull-kubernetes-integration 41916
pull-kubernetes-kubemark-e2e-gce-big 34954
pull-kubernetes-node-e2e 116883
pull-kubernetes-typecheck 37314
pull-kubernetes-verify 119492