sanlock: don't fail with unregistered domains
sanlock: don't fail with unregistered domains

When a domain was started without registration in sanlock, but libvirt
was restarted after that, most of the operations failed due to
contacting sanlock about that process.  E.g. migration could not be
performed because the locks couldn't be released (or inquired before a
release).

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1088034

Signed-off-by: Martin Kletzander <e82f23e74d43760279ebcc505dac4ae70d5627d0@redhat.com>

crobinso/libvirt,datto/libvirt,libvirt/libvirt,shugaoye/libvirt,crobinso/libvirt,olafhering/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,zippy2/libvirt,datto/libvirt,elmarco/libvirt,olafhering/libvirt,elmarco/libvirt,rlaager/libvirt,agx/libvirt,jardasgit/libvirt,jfehlig/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,elmarco/libvirt,agx/libvirt,elmarco/libvirt,shugaoye/libvirt,datto/libvirt,VenkatDatta/libvirt,eskultety/libvirt,jardasgit/libvirt,libvirt/libvirt,jfehlig/libvirt,taget/libvirt,olafhering/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,elmarco/libvirt,fabianfreyer/libvirt,datto/libvirt,eskultety/libvirt,crobinso/libvirt,zippy2/libvirt,jardasgit/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,eskultety/libvirt,andreabolognani/libvirt,crobinso/libvirt,eskultety/libvirt,andreabolognani/libvirt,agx/libvirt,libvirt/libvirt,eskultety/libvirt,jfehlig/libvirt,shugaoye/libvirt,jardasgit/libvirt,jardasgit/libvirt,agx/libvirt,rlaager/libvirt,olafhering/libvirt,agx/libvirt,nertpinx/libvirt,zippy2/libvirt,VenkatDatta/libvirt,zippy2/libvirt,taget/libvirt,taget/libvirt,nertpinx/libvirt,jfehlig/libvirt,datto/libvirt,fabianfreyer/libvirt,rlaager/libvirt,taget/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,taget/libvirt,rlaager/libvirt,rlaager/libvirt