Comment 22 for bug 1599104

I agree with Patil. We found this problem in production environments. Setting policy in RabbitMQ is a good solution to deleting the expired queues, but I guess we should use the same queues after heat restarted.
I set the expired time 1 hour, but when heat restarted twice in 1 hour(upgrading scenario), it leads to thousands of useless queues.