btrfs: test cycle mounting a filesystem right after enabling simple quotas

btrfs: test cycle mounting a filesystem right after enabling simple quotas

Test that if we enable simple quotas on a filesystem and unmount it right
after without doing any other changes to the filesystem, we are able to
mount again the filesystem.

This is a regression test for the following kernel commit:

  f2363e6fcc79 ("btrfs: fix transaction atomicity bug when enabling simple quotas")

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>