Author: Zig Tan
MDL-61881 report_participation: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c98c41712d1ab2ca467ca9d656a326061639add3
http://github.com/moodle/moodle/commit/c98c41712d1ab2ca467ca9d656a326061639add3
+ 3.4 en [privacy:metadata,report_participation]