Updated openstack/openstack
Project: openstack/nova  e4efb4541b21080de4a4f5cae74489d8ed09089d

libvirt: saving the lxc rootfs device in instance metadata

Currently, nbd/loop device, to which lxc image has been
connected, is being saved as instance root device, which causing
the attached bug.
Saving the device name in instance system metadata instead.

Closes-Bug: #1330981
Change-Id: I3a0533a89ea8af61349118a39b822f4af146cc04