Author: sam marshall
MDL-58567 Upgrade: Show upgrade times
http://git.moodle.org/gw?p=moodle.git;a=commit;h=03440bcb37ec476eaa6d94bcdfe3a6e58aa1158a
http://github.com/moodle/moodle/commit/03440bcb37ec476eaa6d94bcdfe3a6e58aa1158a
+ 3.4 en [successduration,core]