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/etcd/tasks/configure.yml

@@ -12,6 +12,15 @@
   when: is_etcd_master and etcd_member_in_cluster.rc != 0 and etcd_cluster_is_healthy.rc == 0
   shell: "{{ bin_dir }}/etcdctl --peers={{ etcd_access_addresses }} member add {{ etcd_member_name }} {{ etcd_peer_url }}"
 
+- name: Install etcd launch script
+  template:
+    src: etcd.j2
+    dest: "{{ bin_dir }}/etcd"
+    owner: 'root'
+    mode: 0755
+    backup: yes
+  notify: restart etcd
+
 - name: Configure | Copy etcd.service systemd file
   template:
     src: "etcd-{{ etcd_deployment_type }}.service.j2"