[Users] backups

[Sander Grendelman]

> The work-around for this is to SSH into the guest first, put the database
> into backup mode(maybe run sync a time or two to flush out as much from RAM
> as possible), take the snap shot, ssh back in to resume the database, backup
> the snap, delete the snap.

The main problem in oVirt with this strategy would be the lack of live
snapshot deletion.
Having to shut down the VM to delete/merge a snapshot is not nice :(