xfs/297: fail test if _scratch_mount fails
xfs/297 formats the scratch device with test specific mkfs options
that limit the use of certain mount options (i.e., if logbsize !=
256k). If an incompatible mount option is set, the mount fails but
the test proceeds to run against the root filesystem.
Update xfs/297 to fail if the mount of the scratch device fails for
whatever reason.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>