Updated openstack/openstack
Project: openstack/nova  f1dd0b9ad65b4c9c6cc48e6bc570d02d25972dbf
null
Port libvirt copy_image tests to mock

Rather than using temporary files, monkey patching and only checking a
subset of utils.execute() arguments, let's use mock.

Change-Id: Ifd1d35d5f44fba16293263bc3b11c405a86aafd4