Feature/add rabbitmq consumer timeout and fix http proxy support for django

[dtuantran]

@Didayolo or @bbearce or @ihsan

Add consumer_timeout into rabbitmq config in order to overwrite default value. Add http proxy support for codalab

A checklist for hand testing

• recreate Codalab with no WORKER_CONNECTION_TIMEOUT value in .env (without variables of HTTP_PROXY, HTTPS_PROXY, NO_PROXY)
• recreate Codalab with a WORKER_CONNECTION_TIMEOUT value in .env (without variables of HTTP_PROXY, HTTPS_PROXY, NO_PROXY)
• recreate Codalab with HTTP_PROXY, HTTPS_PROXY and NO_PROXY variables (already done on production)

Checklist

• Code review by me
• Hand tested by me
• I'm proud of my work
• Code review by reviewer
• Hand tested by reviewer
• CircleCi tests are passing
• Ready to merge

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6901945) 60.38% compared to head (4689e35) 60.38%.

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Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3455   +/-   ##
========================================
  Coverage    60.38%   60.38%           
========================================
  Files          173      173           
  Lines        11411    11411           
========================================
  Hits          6891     6891           
  Misses        4520     4520           

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[dtuantran]

If you are running Docker 5.20, you need to upgrade to 5.24 in order to run apply this changes.

[Didayolo]

Shouldn't this come with changes in docker-compose.yml, so the containers access the new environment variables HTTP_PROXY and HTTPS_PROXY?