This test is inspired by [1], however it has been done on stable Ocata branch 15.0.6 (versus master in link mentioned above.) So, it allows after OVS upgrade launch completely functional VM in overcloud.Obviously, no ovn* packages got installed. Same step on Master is awaiting complete functionality of TripleO QS deployment of Master branch.
:Complete text may bee seen here:
http://dbaxps.blogspot.com/2017/06/attempt-to-upgrade-ovs-to-27-on-ha.html