Git commits in Moodle 3.1.x by Sara Cenni

commit ee8a2e2ed9e62b1b312269d08fdbfdfb314d4529
Author: Sara Cenni <sara.cenni@unibo.it>
Date:   Fri, 22 Jan 2016 17:16:05 +0800
Tag:    v3.1.0-beta

MDL-52683 mod_scorm: Fix for Last completed attempt error with Oracle