Remove jinja delimiters in when

Change-Id: Ifd84b28614a4f7aaf470a3e42dcf6b7cd602d54c

test-install-heat.yml

@@ -24,7 +24,7 @@
       vhost_name: "{{ heat_rabbitmq_vhost }}"
       user_name: "{{ heat_rabbitmq_userid }}"
       user_password: "{{ heat_rabbitmq_password }}"
-      when: "{{ groups['rabbitmq_all'] is defined }}"
+      when: groups['rabbitmq_all'] is defined
     - include: create-grant-db.yml
       db_name: "{{ heat_galera_database }}"
       db_password: "{{ heat_container_mysql_password }}"

test-install-keystone.yml

@@ -27,7 +27,7 @@
       vhost_name: "{{ keystone_rabbitmq_vhost }}"
       user_name: "{{ keystone_rabbitmq_userid }}"
       user_password: "{{ keystone_rabbitmq_password }}"
-      when: "{{ groups['rabbitmq_all'] is defined }}"
+      when: groups['rabbitmq_all'] is defined
     - include: create-grant-db.yml
       db_name: "{{ keystone_galera_database }}"
       db_password: "{{ keystone_container_mysql_password }}"