MDL-39954 core: Adding abstract event assessable_submitted
MDL-39954 mod_assign: Replace old-style event assessable_submitted
MDL-39954 core: Adding abstract event assessable_uploaded
MDL-39954 assignsubmission_file: Replacing old-style events_trigger
MDL-39954 assignsubmission_file: Unit test for new event
MDL-39954 assignsubmission_onlinetext: Replacing old-style events_trigger
MDL-39954 assignsubmission_onlinetext: Unit test for new event
MDL-39954 mod_forum: Replacing old-style events_trigger
MDL-39954 mod_forum: Unit test for new event
MDL-39954 mod_workshop: Log method can return array of parameters
MDL-39954 mod_workshop: Replacing old-style event_trigger
MDL-39954 assignment_online: Replacing old-style event_trigger
MDL-39954 assignment_upload: Replacing old-style event_trigger