Author: Mark Nelson
MDL-40054 mod_lesson: replaced 'update highscores' add_to_log call with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8539411823562be05ec0496ff78967c3a0937264
http://github.com/moodle/moodle/commit/8539411823562be05ec0496ff78967c3a0937264
+ 2.7 en [eventhighscoreadded,mod_lesson]