Deployment - restart any stopped / killed uploads or annotations

[davmlaw]

Something that frequently happens is:

• System is stopped, with any upload or annotation processes killed
• We deploy an upgrade
• We forget to "set any unfinished runs as error" then "retry failed runs" - so they sit there thinking they are running

Some possible solutions are:

• An automated task looks for these and re-starts them automatically (if say there aren't running celery jobs but we think there should be)
• The deployment process warns about running jobs