Fix rollback disk snapshots on instance snapshot failure#12949

sureshanaparti wants to merge 2 commits intoapache:4.22apache/cloudstack:4.22from

shapeblue:fix-rollback-disk-snapshots-on-vm-snapshot-failureshapeblue/cloudstack:fix-rollback-disk-snapshots-on-vm-snapshot-failureCopy head branch name to clipboard