The instance.live_migration_rollback_dest.start and
instance.live_migration_rollback_dest.end notifications has been
transformed to the versioned notification framework.
Co-Authored-By: Takashi Natsume <natsume.takashi@lab.ntt.co.jp>
Change-Id: I8129cbd1785133d4cc1b70bbba6bd7fcc1d21f4a
Implements: bp versioned-notification-transformation-rocky
Gábor Antal