Git commits in Moodle 2.9.3 by Ferenc Lengyel

commit e5cd1282a11573e5a8ff0baabd031859ed74a06e
Author: Ferenc Lengyel <lengyelke@gmail.com>
Date:   Mon, 14 Sep 2015 20:23:51 +0800
Tag:    v2.9.3

MDL-51402 quiz: notification emails should respect grouping