Author: Tim Hunt
MDL-74610 quiz: web service to update grade item for a slot
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3dfd7b9b380191651a9c057a330382a936ddec41
http://github.com/moodle/moodle/commit/3dfd7b9b380191651a9c057a330382a936ddec41
+ 4.4 en [eventslotgradeitemupdated,mod_quiz]