f3e3208fb7
openstack cli doesn't negotiate a microversion. Live migration and multiattach are 2 examples of operations which require arcane incantations to make them work correctly, and therefore usually don't. This adds ``OS_COMPUTE_API_VERSION=2.latest`` to the overcloudrc file to fix it. Change-Id: I6bb4ef5d3d0e53b12f8636b998d7f7c2426c2b60