Resolve "Move references to GUDMAP/RBK"

Allow workflow to download references from datahub. Also started using gudmaprbk dockerhub (containers autobuilt).

PR checklist

• This comment contains a description of changes (with reason)
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated
• Replace dag.png with the most recent CI pipleine integrated_pe artifact
• CHANGELOG.md is updated
• README.md is updated
• [ ] LICENSE.md is updated with new contributors
• [ ] Docker images moved to production release and changed in pipeline
• Docker images used in the CI unit tests match those used in pipeline

• Close issue
  Closes #23 (closed)

/cc @ghenry @venkat.malladi

changed milestone to %1.0.0

added Doing critical labels

marked the checklist item This comment contains a description of changes (with reason) as completed

marked the checklist item If you've fixed a bug or added code that should be tested, add tests! as completed

marked the checklist item Documentation in docs is updated as completed

marked the checklist item CHANGELOG.md is updated as completed

marked the checklist item README.md is updated as completed

marked the checklist item Docker images used in the CI unit tests match those used in pipeline as completed

marked the checklist item *Close issue* as completed

changed the description

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• b2f6e30d - Update changelog

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• 2ec44620 - Auto pep8'd all python code

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resolved all threads

added 1 commit

• cb073c1e - Fix datahub specific bed folder move

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• deabc9e6 - Fix elif

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added 1 commit

• bfc0f444 - Update docs/dag.png

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