contrib/periodic-task-runtimes.sh: Find when the task was started, not when it ended.
contrib/periodic-task-runtimes.sh: Find when the task was started, not when it
ended.

WoLpH/celery,frac/celery,cbrepo/celery,mitsuhiko/celery,WoLpH/celery,ask/celery,mitsuhiko/celery,ask/celery,frac/celery,cbrepo/celery