Author: Michael Hughes
MDL-60683 quiz: Replace quiz legacy cron with tasks
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b09c036bb81d40186c592cf7892ac495489698b4
http://github.com/moodle/moodle/commit/b09c036bb81d40186c592cf7892ac495489698b4
+ 3.7 en [legacyquizaccessrulescron,mod_quiz]
+ 3.7 en [legacyquizreportscron,mod_quiz]
+ 3.7 en [updateoverdueattemptstask,mod_quiz]
+ 3.7 en [quizstatisticscleanuptask,quiz_statistics]