delete delimiter from init fernet condition check

In ansible 2.3.1, conditional statement should not include jinja2
templating delimiters (e.g. {{ ).  So, this change removes the
delimiters from when statemant, and also removes unnesessary
parentheses from until statement.

Closes-Bug: 1702607

Change-Id: I071ffd5ba6175ee1bc61719a84b805c022753459

ansible/roles/keystone/tasks/init_fernet.yml

@@ -2,8 +2,8 @@
 - name: Initialise fernet key authentication
   command: "docker exec -t keystone_fernet kolla_keystone_bootstrap {{ keystone_username }} {{ keystone_groupname }}"
   register: fernet_create
-  changed_when: "{{ fernet_create.stdout.find('localhost | SUCCESS => ') != -1 and (fernet_create.stdout.split('localhost | SUCCESS => ')[1]|from_json).changed }}"
-  until: "(fernet_create.stdout.split()[2] == 'SUCCESS') or (fernet_create.stdout.find('Key repository is already initialized') != -1)"
+  changed_when: fernet_create.stdout.find('localhost | SUCCESS => ') != -1 and (fernet_create.stdout.split('localhost | SUCCESS => ')[1]|from_json).changed
+  until: fernet_create.stdout.split()[2] == 'SUCCESS' or fernet_create.stdout.find('Key repository is already initialized') != -1
   retries: 10
   delay: 5
   run_once: True