Updated openstack/openstack
Project: openstack-infra/devstack-gate  b9349a5e51a616b76ae944c0182eb178b54f8dac

Fix collection of *.failure files

The path to the *.failure files was wrong so the logs were never
collected, which makes debugging grenade service start failures a bit
difficult.

Change-Id: Ia7c24bac23b2a5db86bdf3410668355f774ad770