Make gate-tempest-dsvm-multinode-live-migration gating for nova
Make gate-tempest-dsvm-multinode-live-migration gating for nova

Since we started skipping the non-shared storage volume-backed
live migration tests that were causing the majority of the spurious
failures:

2f68cd3e9f47ca5bb864c26c1b0b123918197ef4

The gate-tempest-dsvm-multinode-live-migration job has gotten
substantially more stable so that's it's comparable to the
gate-tempest-dsvm-full-ubuntu-xenial job:

http://goo.gl/NLRvl7

The job takes only around 30 minutes to run and is controlled
via the nova repo itself so can be disabled/fixed in tree if
necessary.

We should make this voting to avoid any regressions in live migration
as we wind down toward the newton-3 milestone.

Change-Id: Ifa2823305a72352667b65a41d0e6c6a53db9553b

Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config