s3upload function has been moved to notifications-utils.
https://github.com/alphagov/notifications-utils/pull/138 must be merge first.
Remove scratch code that I was using to test celery.send_task method
Revert the update to default_retry_delay.
Increase the countdown, wait 1 minute before executing the task.
Some of the changes in my previous commit are included here, that branch will be merged before this one, so it will make sense.
Update version of notification_utils
Update the version of notifications-utils