Sync rpc fix from oslo-incubator

Sync the following fixes from oslo-incubator:

ef406a2 Create a shared queue for QPID topic consumers
e227c0e Properly reconnect subscribing clients when QPID broker restarts

Closes-bug: #1251757
Closes-bug: #1257293
Change-Id: Ic21e54efa3a0263d53481ef500fb949544dae1d2
Merge "Sync rpc fix from oslo-incubator" into stable/havana