Git commits in Moodle 3.6.x by Segun Babalola

commit 1d88fac6f6588ada07acd74dc235011462f06e54
Author: Segun Babalola <segun@sprynt.com>
Date:   Wed, 04 Sep 2019 19:22:36 +0800
Tag:    v3.6.6

MDL-66391 core_course: Fix to send correct Ajax parameter for userid