Author: Stephen Bourget
MDL-45837 Grades: Add events for scales
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2f3b70985956a987232178123a52850c153f9484
http://github.com/moodle/moodle/commit/2f3b70985956a987232178123a52850c153f9484
+ 3.5 en [eventscalecreated,core_grades]
+ 3.5 en [eventscaledeleted,core_grades]
+ 3.5 en [eventscaleupdated,core_grades]