tests: explicitly force resize2fs's use of lazy (or not)

tests: explicitly force resize2fs's use of lazy (or not)

Resize2fs will not enable lazy_itable if the kernel apparently does
not support that feature.  This will cause spurious test failures when
the tests are running on such a system (or where sysfs is not
mounted).

So for the purposes of the regression test we need to force the use of
lazy_itable so that the results conform to expected golden output.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>