Git commits in Moodle 3.3.x by David Knuplesch

commit e32a370df213c8ea75107c8a6a89445c4005a487
Author: David Knuplesch <david.knuplesch@uni-ulm.de>
Date:   Tue, 12 Dec 2017 18:44:44 +0800
Tag:    v3.3.4

MDL-60415 mod_lti: avoid confusing error-message


commit fb4da0de30eb6448cbe8998c6cf144d6d615cbf5
Author: David Knuplesch <david.knuplesch@uni-ulm.de>
Date:   Mon, 23 Oct 2017 20:09:12 +0800
Tag:    v3.3.5

MDL-60549 lti: support for  moving embedded lti into separate tab