Updated openstack/openstack
Project: openstack/nova  1d7a1dcb9cc0517b5ab03c2fdcd65bcd52cdd4d5
null
libvirt: Fix confusing use of mox.StubOutWithMock

The code was using a side effect of mox.StubOutWithMock to reset
libvirt_driver.LibvirtDriver._conn after a test before resetting it manually.
This code is shorter, and it's obvious what it does.

Change-Id: I78393f76e132397dd198ac4b6ff998c785ff5690