Author: James Ballard
MDL-48142 core_badge: add badge awarded event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=483cfd763d4fd569d153f0ec7399dcbe7b7c7ca9
http://github.com/moodle/moodle/commit/483cfd763d4fd569d153f0ec7399dcbe7b7c7ca9
+ 2.9 en [eventbadgeawarded,core_badges]