xfsqa: clean up 030 repair output

xfsqa: clean up 030 repair output

With the new checks in xfs_repair, it outputs more information
about errors found than previously. This new output can be ignored
for the purposeѕ of this test, so filter it all out. This will
allow the test to run on new and old reapir binaries.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>