Backup etcd data before restarting etcd

etcd is crucial part of kubernetes cluster. Ansible restarts etcd on
reconfiguration. Backup helps operator to restore cluster manually in
case of any issues.

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

roles/etcd/handlers/main.yml

@@ -2,10 +2,13 @@
 - name: restart etcd
   command: /bin/true
   notify:
+    - Backup etcd data
     - etcd | reload systemd
     - reload etcd
     - wait for etcd up
 
+- include: backup.yml
+
 - name: etcd | reload systemd
   command: systemctl daemon-reload