Author: Zig Tan
MDL-61975 tool_recyclebin: Implemented null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0e16e180df8d0b80390dcce6e331b06bc72d7982
http://github.com/moodle/moodle/commit/0e16e180df8d0b80390dcce6e331b06bc72d7982
+ 3.4 en [privacy:metadata,tool_recyclebin]