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"