Unable to create volume with the same name as the one deleted.

To recreate: 
    \*   Create a volume.
    \*   Take a snapshot.
    \*   Copy the snapshot into a new volume.
    \*   After this you will have -
        storagePolicy1/vol1
        storagePolicy1/vol1copy
    \*   delete both volumes.
    Now if I try to create storagePolicy1/vol1 it's throwing an error saying volume exists, But when I do a list-all it does not show up.
