Update rabbitmq example

examples/playbooks/rabbitmq.yml

@@ -12,7 +12,7 @@
     apt_repository: repo='deb http://www.rabbitmq.com/debian/ testing main' state=present
 
   - name: install rabbitmq
-    apt: pkg=rabbitmq-server=$rabbitmq_version state=installed force=yes
+    apt: pkg=rabbitmq-server={{rabbitmq_version}} state=installed force=yes
 
   - name: enable rabbitmq plugins
     rabbitmq_plugin: names=rabbitmq_management,rabbitmq_tracing,rabbitmq_federation state=enabled
@@ -20,7 +20,7 @@
     - restart rabbitmq
 
   - name: add users
-    rabbitmq_user: user=$item password=changeme tags=administrator,$item vhost=/ configure_priv=.* write_priv=.* read_priv=.* state=present
+    rabbitmq_user: user={{item}} password=changeme tags=administrator,{{item}} vhost=/ configure_priv=.* write_priv=.* read_priv=.* state=present
     with_items:
     - user1
     - user2