Git commits in Moodle 3.7.x by Mario Wehr

commit c3f4abed6f876479d094c538270858e57d3bb23c
Author: Mario Wehr <m.wehr@fh-kaernten.at>
Date:   Sat, 28 Dec 2019 19:05:45 +0800
Tag:    v3.7.5

MDL-67204 assign task: Use lastruntime from task_scheduled