Author: Tim Hunt
MDL-29854 questions: display better message and more useful continue
when an error occurs in the middle of processing responeses.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=bed495578f0788d0c3633043e4495478bd89336f
http://github.com/moodle/moodle/commit/bed495578f0788d0c3633043e4495478bd89336f
+ 2.2 en [errorprocessingresponses,core_question]