The new 'xfsquota' configuration for generic/050 doesn't filter out
SCRATCH_MNT properly and seems to be missing an error message in the
golden output. Fix both of these problems.
Fixes: e088479871 ("generic/050: Handle xfs quota special case with different output") Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Eryu Guan <guaneryu@gmail.com>