Author: Shamim Rezaie
MDL-34411 mod_quiz: quiz overrides to observe group membership
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3bb633edc4ad02ff198de355553681ef9cd21041
http://github.com/moodle/moodle/commit/3bb633edc4ad02ff198de355553681ef9cd21041
+ 3.5 en [groupsnone,mod_quiz]