Improve scope management

[aarranz]

Proposed changes

This PR updates the validateScope method to allow providing a space-separated list of scopes (in addition to support current comma-separated behaviour). This PR also adds unit tests.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality
  to not work as expected)

Checklist

• I have read the
  CONTRIBUTING
  doc
• I have signed the
  CLA
• I have added tests that prove my fix is effective or that my feature
  works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream
  modules

Further comments

OAuth2/Open ID Connect services use space-separated lists of scopes by default, so this should make standard clients happier and allow to use more libraries for connecting to KeyRock. In any case, the default comma-separated behaviour should be maintained and ensured due to the new unit tests.

Now that KeyRock uses a custom implementation of oauth-server, the implementation can be simplified avoiding to tests if the scope parameter is an argument array or just the scope string (I think that this requirement is meet just at current version but please, confirm if possible).

[github-actions]

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[aarranz]

Dear KeyRock team,

Any comment regarding this? Something to change?

Best regards.

[apozohue10]

Hi @aarranz,

apologies for the delay. I have made some tests to check that everything was ok. I will accept the PR right now.