Git commits in Moodle 3.6.x by Matt Porritt

commit fec1ffae54d6385915e03e01ae638658d77ac952
Author: Matt Porritt <mattp@catalyst-net.au>
Date:   Tue, 25 Jun 2019 20:17:53 +0800
Tag:    v3.6.6

MDL-56835 report_participation: release session lock