oslo: update the rpc module

- It now requires the versionutils module.
- We need to deal with the "allow_rpc_exception_modules" not
  including heat.common.exception

Change-Id: I1ea1479d7bc023649b2af0f68683e9a81f868df9
Set the rpc control_exchange "again"

rpc_set_default() is never called, since all the config
opts always registed just do this globally.

Change-Id: I277318ec5e903074976ee39460d8583505a723a4
Closes-bug: #1257595
Merge "oslo: update the rpc module"
Merge "Set the rpc control_exchange "again""