Upgrade Celery and related dependencies

[ccostino]

We've been having a few issues with the downloads recently and have pinned down the issue to be a couple of things:

• Not enough disk space allocated in the Celery apps that support downloads
• Out of date dependencies

We need to upgrade Celery and its related dependencies and allocate more disk space to the apps to provide an immediate fix to the problem. A more long-term solution would be looking into writing download output directly to the S3 buckets if possible (this would be a separate issue).

NOTE

We have already allocated more disk space to the Celery apps in the interim, but we did so manually. The upcoming PR #2471 makes this a permanent change by updating the manifest file(s).

[ccostino]

Closing in favor of #2459 which has more history and details of this.