Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. kubeadm enable endpoint-reconciler for HA clusters **What this PR does / why we need it**: enable endpoint-reconciler on kube-apiserver when creating HA clusters with kubeadm **Which issue(s) this PR fixes**: [#529](https://github.com/kubernetes/kubeadm/issues/529) **Special notes for your reviewer**: CC @luxas **Release note**: ```release-note NONE ```