Git commits in Moodle 3.10.1 by Michael Aherne

commit bbb83614d2a507772cea52278c71f5f087f7da27
Author: Michael Aherne <michael.aherne@strath.ac.uk>
Date:   Mon, 17 Jun 2019 19:24:39 +0800
Tag:    v3.10.1

MDL-65941 cache: Prevent cache config failure on redis problems.