Author: Shamim Rezaie
MDL-34411 mod_quiz: quiz overrides to observe group membership
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6faeafa53dcf07b0fa7c6d38e05c768a62ef4539
http://github.com/moodle/moodle/commit/6faeafa53dcf07b0fa7c6d38e05c768a62ef4539
+ 3.6 en [groupsnone,mod_quiz]