Author: Adrian Greeve
MDL-42850 administration: Updated bulk user upload errors to be more descriptive.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a2071fbf7c3ae5bdca98d4ae16b6105e4419d261
http://github.com/moodle/moodle/commit/a2071fbf7c3ae5bdca98d4ae16b6105e4419d261
+ 2.6 en [csvloaderror,core_error]