indexer: rollback all kv stores on rollback
indexer: rollback all kv stores on rollback

forestdb needs all kv stores to be rolled back explicitly.
This can be changed once rollback becomes a file level operation.

Change-Id: I68883c2e39a92eeb0dd371e0e7a59c1a74af83be

jchris/indexing,jchris/indexing,jchris/indexing,jchris/indexing