Updated openstack/openstack
Project: openstack/oslo.messaging  a2f719f0fcaa72d9afa2729f9b84b0e1e8ab9541

Cleanup listener after stopping rpc server

If you don't close the AMQP connection, then the connection
remains open and the next time when the messages are sent on
the listening topic, then some of the messages will not be processed
as there is no dispatcher running to process the message.

Closes-Bug: #1335086
Change-Id: I1f39eedf1500b6b6209ae0222f32e08e304895e0