Author: Zig Tan
MDL-61881 report_security: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=bc421d6d46f1739352e0fc4a53f2392e5329f37c
http://github.com/moodle/moodle/commit/bc421d6d46f1739352e0fc4a53f2392e5329f37c
+ 3.4 en [privacy:metadata,report_security]