Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

This is a hacky POC; we need to implement rootless PCM in the proper way.
Especially, pcm.Exists(existingPodName) needs to be implemented to return true
even when cgroups is not available.
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

Automated cherry pick of #75529: bump required minimum go version to 1.12.1 (strings pkg compatibility)

Automated cherry pick of #75487: Restore machine readability to the print-join-command output

The output of `kubeadm token create --print-join-command` should be
usable by batch scripts. This issue was pointed out in:

https://github.com/kubernetes/kubeadm/issues/1454

Restore username and password kubectl flags

Mark audit e2e tests as flaky

Move to golang 1.12.1 official image