Fixed by commit 7c646c538e btrfs-progs: qgroup: Fix regression leads
to corrupted qgroup status.
Add minimal test image for that fix.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
[ minor cleanups in test.sh ]
Signed-off-by: David Sterba <dsterba@suse.com>
