Git commits in Moodle 2.3.1 by Jerome Mouneyrac

commit 08641906e1078b0b969ece435ae843d819132785
Author: Jerome Mouneyrac <jerome@moodle.com>
Date:   Wed, 27 Jun 2012 16:24:22 +0800
Tag:    v2.3.1

MDL-33995 Course external PHPunit test + externallib_testcase helper class

commit 6b5ce20c169f26e3059da98f0a7761e01156d3de
Author: Jerome Mouneyrac <jerome@moodle.com>
Date:   Wed, 20 Jun 2012 15:49:20 +0800
Tag:    v2.3.1

MDL-33776 Web services: get_categories - subcategories should be checked against visible/theme keys

commit 18c264790a50dcd959838651a3e8766d3d60c345
Author: Jerome Mouneyrac <jerome@moodle.com>
Date:   Fri, 15 Jun 2012 15:14:06 +0800
Tag:    v2.3.1

MDL-33770 Web service: create_groups should not require enrolmentkey