Set RabbitMQ message TTL and queue expiry

Following ideas here:
https://wiki.openstack.org/wiki/Large_Scale_Configuration_Rabbit

Make sure old messages with no consumer are dropped after the message
TTL of 10 mins, longer than the 1 min RPC timeout.
Also ensure queues expire after an hour of inactivity, so queues from
removed nodes or renamed nodes don't grow over time.

Change-Id: Ifb28ac68b6328adb604a7474d01e5f7a47b2e788