Refactor etcd role

- Run docker run from script rather than directly from systemd target
- Refactoring styling/templates

Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

roles/kubernetes/node/tasks/install_docker.yml

@@ -1,9 +1,9 @@
 ---
 - name: install | Install kubelet launch script
-  template: 
-    src: kubelet-container.j2 
-    dest: "{{ bin_dir }}/kubelet" 
-    owner: kube 
-    mode: 0755 
+  template:
+    src: kubelet-container.j2
+    dest: "{{ bin_dir }}/kubelet"
+    owner: kube
+    mode: 0755
     backup: yes
   notify: restart kubelet