tempest-dsvm-multinode-live-migration: use d-g for tempest
tempest-dsvm-multinode-live-migration: use d-g for tempest

Use devstack-gate scripts to configure tempest.
Then hook in nova will only run initial tempest test
and make configuration changes then

Change-Id: Ic6ff3446f4c549f99ccc5248ff449b2201c24eee

noorul/os-project-config,openstack-infra/project-config,openstack-infra/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,Tesora/tesora-project-config,noorul/os-project-config