Updated openstack/openstack
Project: openstack/sahara  4922543383c14d4af3704a72e4f62ee041da16d4

Add oslo.messaging confs to sample config

Add oslo.messaging as external lib to the oslo.cfg.generator. It was
missed while adding alpha support for multi process sahara deployment.

Change-Id: If6763ff4d945b7f4838f192947db03cabacb41c8