Do not log passwords

This prevents data to be leaked into the callback plugin.

Change-Id: Ic2b88c6442d5a8e76e7f4c7b7ee8686ef0070f5e
(cherry picked from commit 8641a0240c)

create-grant-db.yml

@@ -21,6 +21,7 @@
     state: "present"
   delegate_to: "{{ groups['galera_all'][0] }}"
   run_once: True
+  no_log: true
 - name: Grant access to the DB for the service
   mysql_user:
     login_user: "root"
@@ -37,3 +38,4 @@
     - "%"
   delegate_to: "{{ groups['galera_all'][0] }}"
   run_once: True
+  no_log: true