Git commits in Moodle 3.0.1 by Tim Hunt

commit 7cac3f6fe9a5d41ebc77787a694427b0072cc67d
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Tue, 24 Nov 2015 23:58:54 +0800
Tag:    v3.0.1

MDL-52292 block testing generators: improve the API


commit dec56ff2043d8d6d1b4e86580288a39c9550a53d
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Mon, 16 Nov 2015 22:37:42 +0800
Tag:    v3.0.1

MDL-52166 gradebook: overview report fails with separate groups