Author: Tomo Tsuyuki
MDL-67186 group: add custom fields
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d8a4cc95334438fdd2c16e3ec891c8c19a517116
http://github.com/moodle/moodle/commit/d8a4cc95334438fdd2c16e3ec891c8c19a517116
+ 4.3 en [grouping_customfield,core_admin]
+ 4.3 en [group_customfield,core_admin]
+ 4.3 en [group:configurecustomfields,core_role]