Git commits in Moodle 2.8.8 by sam marshall

commit f69d98df43a55432adf839305281240a4e3e1a6a
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Tue, 11 Aug 2015 21:36:07 +0800
Tag:    v2.8.8

MDL-51077 Availability: Date restriction unit test static not cleared


commit 9cb8cd1a219c7409d527714f756aaf65a379cf21
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Sat, 08 Aug 2015 00:47:22 +0800
Tag:    v2.8.8

MDL-51053 Restore: Static cache breaks unit tests


commit 349ed8c86cec97b5429ede679f8fb2421fc724d2
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Wed, 05 Aug 2015 21:27:40 +0800
Tag:    v2.8.8

MDL-51007 Availability: Unit test fails with extra plugins