check: try to fix the test device if it gets corrupted

check: try to fix the test device if it gets corrupted

If the test device gets corrupted all subsequent tests will fail.  To
prevent this from causing all subsequent tests to be useless, try
repair the file system on TEST_DEV if possible.  We don't need to do
this with the scratch device since that file system gets recreated
each time anyway.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Zorro Lang <zlang@kernel.org>