This is the HEAD of the original OVM3 drop
Tagging release 4.3.0 on branch 4.3
Tagging release 4.2.1 on branch 4.2.
Tagging 4.2.0 release
Tagging release 4.1.1 on branch 4.1.
Tagging release 4.1.0 on branch 4.1.
Tagging release 4.0.2 on branch 4.0.
Tagging release 4.0.1-incubating on branch 4.0
Tagging release 4.0.0-incubating on branch 4.0.
Bug : 15133 only delete snapshot which is not referenced by any snapshots in DB for a volume