Create certificates for kubelet and kube-proxy on control-plane
nodes similar to worker nodes. Use the secure kube-apiserver
port on control-plane nodes.
story: 2008524
task: 41602
Change-Id: Ibeb32a24ca25914cab32c63a9ccafaf711148a84
Signed-off-by: Spyros Trigazis <spyridon.trigazis@cern.ch>