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/meta/main.yml

@@ -1,5 +1,5 @@
 ---
 dependencies:
-  - role: download
-    file: "{{ downloads.kubernetes_kubelet }}"
+  - role: download #For kube_version
+    file: "{{ downloads.nothing }}"
   - role: kubernetes/secrets