Author: Zig Tan
MDL-61975 tool_recyclebin: Implemented null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=825c2fdf8c398f25b25b99c52d4dba92a52015bc
http://github.com/moodle/moodle/commit/825c2fdf8c398f25b25b99c52d4dba92a52015bc
+ 3.5 en [privacy:metadata,tool_recyclebin]