3187: Migration to add started_at and finished_at to job_tasks and pipeline_instances.
3187: Record started_at and finished_at for tasks and pipelines.
Merge branch 'master' into 3187-start-finish-timestamps-tasks-pipelines
3187: Update the task start time when the task actually starts.
Fixed typo Y% -> %Y
Merge branch '3187-start-finish-timestamps-tasks-pipelines' refs #3187