zdtm: Add checkskip scripts for OFD locks

This is needed in cases when kernel doesn't support OFD locks.
(OFD locks were added in 2014).

travis-ci: success for zdtm: Add checkskip scripts for OFD locks
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Eugene Batalov <eabatalov89@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>