fix the duplicate entry of rabbitmq_refresh

playbooks/roles/launch_ec2/tasks/main.yml

@@ -29,7 +29,7 @@
     module: ec2
     state: 'absent'
     region: "{{ region }}"
-    instance_ids: "{{tag_lookup.instance_ids}}"
+    instance_ids: "{{ tag_lookup.instances[0].id }}"
   when: terminate_instance == true and tag_lookup.instances|length == 1
 
 - name: deregister instance from an an elb if it was in one