MDL-40054 events: changed instances_list to instance_list
MDL-40056 scorm: Add phpunit data generators for scorm module
MDL-40056 events: Added attempt_deleted scorm event
MDL-40056 events: Add unit tests for the new scorm events
MDL-40056 events:Add new events to scorm

    Following events are added in this patch:-
    course_module_viewed
    instance_list_viewed
    interactions_viewed
    report_viewed
    sco_launched
    tracks_viewed
    userreport_viewed
MDL-40056 events: Replace add_to_log with new events in scorm