Git commits in Moodle 3.10.x by Srdjan

commit 93f70c9d9d341b1506dd4ba270b7f8b39155c59f
Author: Srdjan <srdjan@catalyst.net.nz>
Date:   Thu, 06 Aug 2020 12:35:27 +0800
Tag:    v3.10.7

MDL-69451 dml: use same temptables for both rw and ro database handle