Bringing IsUserIdInClaims to working status in OIDC

[indeewari]

Proposed changes in this pull request

The IDP configuration "IsUserIdInClaims" is supposed to decide whether the subject identifier is taken from the IDP claims or not. This flow was not in working status for OIDC authenticators. This PR is to fix that problem in this module. There is a mandatory dependent PR in the framework as well.

When should this PR be merged

This is a draft PR.

Follow up actions

Approval of the modifications

Checklist (for reviewing)

General

• Is this PR explained thoroughly? All code changes must be accounted for in the PR description.
• Is the PR labeled correctly?

Functionality

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• Does the UI work as expected? There should be no Javascript errors in the console; all resources should load. There should be no unexpected errors. Deliberately try to break the feature to find out if there are corner cases that are not handled.

Code

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• Does the PR introduce any inefficient database requests? Use the debug server to check for duplicate requests.
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Tests

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• If this is a bug fix, are tests for the issue in place? There must be a test case for the bug to ensure the issue won’t regress. Make sure that the tests break without the new code to fix the issue.
• If this is a new feature or a significant change to an existing feature? has the manual testing spreadsheet been updated with instructions for manual testing?

Security

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• Does this solution handle outliers and edge cases gracefully?
• Are all external communications secured and restricted to SSL?

Documentation

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• Are changes to the API documented in the API docs? If this PR introduces new API functionality or changes existing ones, the changes must be documented.
• Are reusable components documented? If this PR introduces components that are relevant to other developers (for instance a mixin for a view or a generic form) they should be documented in the Wiki.