Author: Stephen Bourget
MDL-49430 Lesson: Add restarted and resumed events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e0f7b963475929fec76d1e76335a52d625cf8438
http://github.com/moodle/moodle/commit/e0f7b963475929fec76d1e76335a52d625cf8438
+ 2.9 en [eventlessonrestarted,mod_lesson]
+ 2.9 en [eventlessonresumed,mod_lesson]