Git commits in Moodle 3.1.2 by Tobias Reischmann

commit e23d29dc91b575df56e3e625253ba8930c0a9faf
Author: Tobias Reischmann <tobias.reischmann@wi.uni-muenster.de>
Date:   Fri, 10 Jun 2016 20:43:26 +0800
Tag:    v3.1.2

MDL-54892 core: Pass proper parameter for plugin uninstall queries