Git commits in Moodle 3.4.0 by David Knuplesch

commit 3b3535c7ea74ef92e8d65dce40b2fbf2d0e327e8
Author: David Knuplesch <david.knuplesch@uni-ulm.de>
Date:   Fri, 01 Sep 2017 18:58:02 +0800
Tag:    v3.4.0-beta

MDL-55358 mod_lti: Add group variable Moodle.Person.userGroupIds

commit 3729ff0ff45e78303f1bced0183f989fca8dedab
Author: David Knuplesch <david.knuplesch@uni-ulm.de>
Date:   Tue, 20 Jun 2017 19:17:49 +0800
Tag:    v3.4.0-beta

MDL-55358 mod_lti: Add LIS Group Variable