Author: Gerard (Gerry) Caulfield
MDL-30935_in_lti_change_role_from_instructor_to_teacher
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0758f991b36bdccb429b08a05ccbafe1d7ad977d
http://github.com/moodle/moodle/commit/0758f991b36bdccb429b08a05ccbafe1d7ad977d
+ 2.3 en [delegate,mod_lti]
+ 2.3 en [imsroleadmin,mod_lti]
+ 2.3 en [imsroleinstructor,mod_lti]