Update common to get new kombu serialization code

There are some changes in the serialization format for
messages sent with the kombu driver under some situations,
so bring in the new version of the driver to ensure we
can communicate with other components also using the new
format.

Change-Id: Iffd102cb780d13a40e93047a59917dc56c4d56ea
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Merge "Update common to get new kombu serialization code"
Revert recent rpc wire format changes

These changes were reverted in oslo by:

  6f9cef8 Revert "Implement replay detection."
  3b848ae Revert "Fast serialization of RPC envelopes for Kombu"

Change-Id: Iba03fe3961b095173f38bc1ab46df6272d8512fd
Fix message envelope keys.

update.py from oslo-incubator broke the keys used in the rpc message
envelope.  This fixes it.

Change-Id: I2fc89f978e507aa4f54e1b137a69b1601eb9b682