A user reported a regression where we could no longer rename a subvolume into
another subvolume. This is a test case to do just that to make sure we don't
regress on this again.
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>