Git commits in Moodle 3.1.3 by Ruslan Kabalin

commit ac8ad1ae8121bead8c9e5aa7decd4c5e58b3f7e4
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Fri, 02 Sep 2016 18:38:22 +0800
Tag:    v3.1.3

MDL-55776 enrol: Optimise enrolled users listing.

commit 40e34b842bcc3ef1f86b80c3db64a4d2b49646b1
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Fri, 02 Sep 2016 18:36:43 +0800
Tag:    v3.1.3

MDL-55776 enrol: Add unit tests for enrolment manager.