Add live migration with trunk test

Change-Id: I2d75fae81145b4bd1c0d38fabd785bc26835be15
Related-Bug: #1914747
Depends-On: https://review.opendev.org/c/openstack/neutron/+/774245
Depends-On: https://review.opendev.org/c/openstack/nova/+/775838
6 files changed