Updated openstack/openstack
Project: openstack/nova  e67167e042bc0b2cb7ae881945cd6b2dbb4b0d5c

virt: Convert more tests to use instance objects

Update a couple of methods in test_virt_drivers so that they
use instance objects instead of dicts

Blueprint: libvirt-driver-class-refactor
Change-Id: Ib2257ac97c533a8a0d7f45994d21a67d08444e19