Git commits in Moodle 2.7.6 by Botond Hegedus

commit bd3332ff6eb1b8d0edde6fc7258f02321bfc56a2
Author: Botond Hegedus <botondhegedus.webdeveloper@gmail.com>
Date:   Sun, 15 Feb 2015 20:33:37 +0800
Tag:    v2.7.6

MDL-49198 core_webservice: Fix error when using existing service name