Author: Tim Hunt
MDL-47494 gapselect: Fix codechecker issues.
Also remove old translations that are now in AMOS, and add some unit
tests.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8d6fb0c66a8d960ccfecee3b2cc575b4ddb4d70c
http://github.com/moodle/moodle/commit/8d6fb0c66a8d960ccfecee3b2cc575b4ddb4d70c
+ 3.0 en [tagsnotallowed,qtype_gapselect]
+ 3.0 en [tagsnotallowedatall,qtype_gapselect]