Updated openstack/openstack
Project: openstack/oslo.messaging  f6ef9161e43a98c7e442ff4dd1dd4515169edf2f

Add release notes for stable/icehouse 1.3.1 release

1.3.1 is a bugfix release from the stable/icehouse branch.

Change-Id: I1ec24b0aaccb67e4f3043d481cec13d82dec3c0d