Sync rpc fix from oslo-incubator

Sync the following fixes from oslo-incubator:

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

Closes-bug: #1251757
Closes-bug: #1257293
Change-Id: I286edf6bc4a677aa61f60da785802c19878c79c7
Merge "Sync rpc fix from oslo-incubator" into stable/havana