The live migration test are only running if tempest expect more than 1 hypervisor (or nova host with compute binary). When tempestconf gets admin credentials it has the ability to guess this option properly, so please implement this.
Fixed in https://github.com/openstack/python-tempestconf/commit/9be036cf1fa6b4992a29fa815c3dedd8650b9625
The patch with a fix has been merged to master branch. The fix will be included in python-tempestconf-2.0.0 package released soon. Until a package containing the fix is built, moving to POST state.
The python-tempestconf-2.0.0-0.20180821043805.d7db90e.el7ost package contains the wanted ability. It's available in 2018-10-25.3 puddle and it's also available via latest symlink.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2019:0045