Author: Shamim Rezaie
MDL-34411 mod_quiz: quiz overrides to observe group membership
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e6539e713952170b501027b3de7fb0895fc5c99e
http://github.com/moodle/moodle/commit/e6539e713952170b501027b3de7fb0895fc5c99e
+ 3.7 en [groupsnone,mod_quiz]