Updated openstack/openstack
Project: openstack/nova  6979bfd609cc31b127d926a6786cc93ebd9aacd9

libvirt: speed up get_vcpus method

Switch the get_vcpus method method to use the new
list_instance_domains method.

Blueprint: libvirt-domain-listing-speedup
Change-Id: I474d6db502d19f2296252f4f3ae2ef740a2188e8