Updated openstack/openstack
Project: openstack/nova  9899904e7a70b27f6969eccf27ab6c178e755ec1

libvirt: convert LibvirtNonblockingTestCase to avoid DB usage

The LibvirtNonblockingTestCase test case does not do anything DB
related. Convert it to NoDBTestCase to avoid DB setup penalty.
This improves perf from 1.8s to 0.4s

Partial-bug: #1369516
Change-Id: I6ff4f46a2e8c2e436d40dd47134f5ec496ce153f