Updated openstack/openstack
Project: openstack-dev/devstack  68e9f05f7c19b1bd9d4c7e8e7f88fbf93d18b9f9

remove kombu from package lists

This is a pure python library that we should probably let pip
handle so that we don't accidentally only test whatever patched
version is in trusty instead of the upstream versions.

Change-Id: I93d2f9344b9f83d2397466b4bc29c97210919ed9