Author: Sara Arjona
MDL-61952 gradeexport_txt: Implement privacy API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a8f19ad776d96bcacaf3c38016a5859c257036ce
http://github.com/moodle/moodle/commit/a8f19ad776d96bcacaf3c38016a5859c257036ce
+ 3.3 en [privacy:metadata,gradeexport_txt]