Author: Zig Tan
MDL-61881 report_eventlist: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=09913a019bb4c61906b61f96d31a0c4793e38456
http://github.com/moodle/moodle/commit/09913a019bb4c61906b61f96d31a0c4793e38456
+ 3.3 en [privacy:metadata,report_eventlist]