Author: Zig Tan
MDL-61881 report_security: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d8e07b9f75c8930f7bcb93726657eb68a90d4a6c
http://github.com/moodle/moodle/commit/d8e07b9f75c8930f7bcb93726657eb68a90d4a6c
+ 3.5 en [privacy:metadata,report_security]