Git commits in Moodle 2.1.5 by Gootvilig David Hai

commit 960b382617373fb89f99557f4bd061ecc746206e
Author: Gootvilig David Hai <dhg@atarplpl.co.il>
Date:   Mon, 05 Mar 2012 20:38:13 +0800
Tag:    v2.1.5

MDL-31876 questionlib: fix question_has_capability_on memory bloat