PATCH 3/3 V6] xfs: test changing UUID on V5 superblock

PATCH 3/3 V6] xfs: test changing UUID on V5 superblock

Tests xfs_db's ability to change & restore UUIDs on V5 filesystems,
and tests xfs_copy's ability to change the UUID on the copy.

Update to _filter_uuid is so that it will catch the UUID output
from xfs_admin -u, which is slightly different than the regexp it
was expecting.

This requires new userspace which knows how to change the UUID on
a V5 superblock.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>