small fixes mostly variable names

roles/rabbitmq/tasks/main.yml

@@ -16,6 +16,10 @@
     name: rabbitmq.service
     state: started
 
+- name: wait for container to be started
+  wait_for:
+      port: 15671
+
 - name: setup the cluster
   command: "docker exec -i rabbitmq.service {{ item }}"
   with_items: