Do not log passwords

This prevents data to be leaked into the callback plugin.

Change-Id: Ied6126021bc19fb842541a3234a1005fd16df619
(cherry picked from commit d2d8daae74)

test-install-horizon.yml

@@ -39,6 +39,7 @@
       until: add_service|success
       retries: 5
       delay: 2
+      no_log: true
     - name: Ensure nova endpoint
       keystone:
         command: "ensure_endpoint"
@@ -61,6 +62,7 @@
       until: add_service|success
       retries: 5
       delay: 10
+      no_log: true
   roles:
     - role: "{{ horizon_rolename | default('os_horizon') }}"
   vars_files: