Deploy kubelet and kube-apiserver as containers

kubelet via docker
kube-apiserver as a static pod

Fixed etcd service start to be more tolerant of slow start.

Workaround for kube_version to stay in download role, but not
download an files by creating a new "nothing" download entry.

roles/kubernetes/node/tasks/main.yml

@@ -26,7 +26,7 @@
 - name: Restart kubelet if binary changed
   command: /bin/true
   notify: restart kubelet
-  when: kubelet_copy.stdout_lines
+  when: kubelet_launcher.changed
 
 # reload-systemd
 - meta: flush_handlers