Author: Adrian Greeve
MDL-39962 - Events: Replace lefacy event lti_unknown_service_api call.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b97d94ffbb5b8ce2c4f275d7d6ed3d778149bd46
http://github.com/moodle/moodle/commit/b97d94ffbb5b8ce2c4f275d7d6ed3d778149bd46
+ 2.6 en [ltiunknownserviceapicall,mod_lti]