xfs_repair: check quota values if quota was loaded

xfs_repair: check quota values if quota was loaded

If the filesystem looks like it had up to date quota information, check
it against what's in the filesystem and report if we find discrepancies.
This closes one of the major gaps in corruptions that are detected by
xfs_check vs. xfs_repair.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>