Author: Frederic Massart
MDL-40055 mod_assign: Replace add_to_log 'download all submissions'
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a65b53036ec3f4910f7f4106327a0bec15ee2135
http://github.com/moodle/moodle/commit/a65b53036ec3f4910f7f4106327a0bec15ee2135
+ 2.6 en [event_all_submissions_downloaded,mod_assign]