Update openstack.common

The main motivation for this update is to fix
the way logging is configured so that all
libraries are able to log at the default level.
The other changes come in because there's no
clean way to update the common libs piecemeal.

bug 1152584

Change-Id: I22563f7c0aa7c48edc81cb85328c3ae3ec8c2f11
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>