Author: Victor Deniz Falcon
MDL-65176 analytics: target for students who don't get the minimum grade
Added new target to predict which students are at risk of not getting
the minimum grade to pass a course.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1f23f1412e900e97be661bc1522c34a391f38f42
http://github.com/moodle/moodle/commit/1f23f1412e900e97be661bc1522c34a391f38f42
+ 3.7 en [gradetopassnotset,core_course]
+ 3.7 en [target:coursegradetopass,core]
+ 3.7 en [target:coursegradetopass_help,core]
+ 3.7 en [targetlabelstudentgradetopassno,core]
+ 3.7 en [targetlabelstudentgradetopassyes,core]