Updating celery autoscale and prefetch behavior
Updating celery autoscale and prefetch behavior

* Increase total number of celery jobs to match what we are currently
  supporting in production with very large instances
* Make sure celery in the development environment also uses fair
  scheduling without prefetching

snahelou/awx,wwitzel3/awx,wwitzel3/awx,wwitzel3/awx,snahelou/awx,snahelou/awx,wwitzel3/awx,snahelou/awx