Author: Zig Tan
MDL-61881 report_participation: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=70b123700a120c7f75c11e029bf4c372fa5869a8
http://github.com/moodle/moodle/commit/70b123700a120c7f75c11e029bf4c372fa5869a8
+ 3.5 en [privacy:metadata,report_participation]