Git commits in Moodle 3.7.0 by Fabrice Ménard

commit ddb9b02b053f39e59ddf4993bacf6e728b6c21af
Author: Fabrice Ménard <menard.fabrice@gmail.com>
Date:   Mon, 27 Nov 2017 20:57:48 +0800
Tag:    v3.7.0-beta

MDL-60432 auth_cas: Using Identity Providers for Authentication CAS