Author: Jun Pataleta
MDL-54976 mod_scorm: Add validation for availability dates
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9f83ce7e0c96cd0b51db86ddffc9537750b42989
http://github.com/moodle/moodle/commit/9f83ce7e0c96cd0b51db86ddffc9537750b42989
+ 3.2 en [closebeforeopen,mod_scorm]