[Core] Primary Wrangler Support

[MightyAx]

Acceptance Criteria

• Store a Primary Wrangler user against a project.
• If the user is a wrangler, when they inspect the /user/projects endpoint:
  • Include projects for which they are the Primary Wrangler.
  • Include projects they created (the current functionality).
• Ensure that non-wrangler users can still use the /user/projects endpoint to retrieve projects that they created.

Speak to @rdgoite for how to inspect details of the user's token in core, to check if they are a wrangler.

[aaclan-ebi]

I believe not this is not implemented yet.

/user/projects would only return the list of projects that the user has created. I'm moving this to Product backlog for prioritization.

[aaclan-ebi]

Changes were released to production last 15th July.
https://github.com/ebi-ait/ingest-kube-deployment/blob/master/production/changelog.md#15-july-2020