Add less verbosity for fernet keys ansible playbook

The default verbosity ended up logging the values of the fernet keys.
This is not desirable, so we set the least amount of verbosity to stop
this.

Change-Id: I38646729692231f305630fc36ef7591a99daff63
Closes-Bug: #1714198

playbooks/rotate-keys.yaml

@@ -24,6 +24,7 @@
           owner: keystone
           group: keystone
         with_dict: "{{ fernet_keys }}"
+        no_log: true
 
       - name: Restart keystone container
         shell: docker restart keystone
@@ -44,6 +45,7 @@
           owner: keystone
           group: keystone
         with_dict: "{{ fernet_keys }}"
+        no_log: true
 
       - name: Reload apache
         service:

workbooks/fernet-key-rotate.yaml

@@ -53,6 +53,7 @@ workflows:
           inventory: /usr/bin/tripleo-ansible-inventory
           ssh_private_key: <% task(get_privkey).result %>
           ssh_extra_args: '-o StrictHostKeyChecking=no'
+          verbosity: 0
           remote_user: heat-admin
           become: true
           extra_vars: