libvirt: plumb through VM shutdown
libvirt: plumb through VM shutdown

johnelse/xenopsd,simonjbeaumont/xenopsd,djs55/xenopsd,johnelse/xenopsd,djs55/xenopsd-previous,koushikcgit/xenopsd,koushikcgit/xenopsd,cheng--zhang/xenopsd,djs55/xenopsd,simonjbeaumont/xenopsd,euanh/xenopsd,djs55/xenopsd-previous,djs55/xenopsd,thomassa/xenopsd,johnelse/xenopsd,cheng--zhang/xenopsd,euanh/xenopsd,koushikcgit/xenopsd,simonjbeaumont/xenopsd,euanh/xenopsd,thomassa/xenopsd,cheng--zhang/xenopsd,thomassa/xenopsd,djs55/xenopsd-previous