[Engine-devel] Adding atomic restore snapshot command at backend

Currently 'restore snapshot' done in two steps on a client side: 1. TryBackToAllSnapshotsOfVm 2. RestoreAllSnapshots This implementation creates race condition on 1 and therefore unstable & bug prone, i suggested refactoring 2 to include 1 as single atomic operation at backend. -- Michael Pasternak RedHat, ENG-Virtualization R&D