Other strategy to limit celery eating CPU,  and avoid countdown tasks beiing prefetched all the time because they are not counted in prefetched tasks. This commit could eventually make celery masters stop eating CPU and going mad because we have too much tasks.
version bump for 0.80.48.
Merge branch 'release/0.80.48' into develop
Include the broker in procfile.
version bump for 0.80.49.
Merge branch 'release/0.80.49' into develop