Updated openstack/openstack
Project: openstack/nova  2eff6795d0fd4c810f3eb5d63d229a117ab48052

Backport some v3 certificate API unittest to v2 API

This patch add some v3 certificate API unittest into V2 API to improve
V2 API unittesting.

Change-Id: Icf58abbf1e83636047c1f98ff80a38077e2d694b