Fix https://github.com/Intersmash/intersmash/issues/37

[tommaso-borgato]

Fix #37 and part of #21

This MR contains:

• new provisioner for the new Quarkus based Keycloak Operator
• improvement to the PostreSQL image provisioner which is now capable of storing and consuming credentials from a secret that other applications can use to connect to the database (this was needed to provide integration with the new Quarkus based Keycloak Operator)

Description

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change
• Chore (non-breaking change which doesn't affect codebase;
  test, version modification, documentation, etc.)

Checklist

• Code contributed by me aligns with current project license: Apache 2.0
• Pull Request contains a description of the changes
• Pull Request does not include fixes for multiple issues/topics
• Code is self-descriptive and/or documented
• I have implemented unit tests to cover my changes
• I tested my code in OpenShift

[fabiobrz]

Hi @tommaso-borgato - thanks for this PR, great job.
I'd have a couple of comments but we should remove the duplication due to the ongoing changes to XTF.
Could you please use the XTF version that I just released, remove duplicated classes and rebase?

[tommaso-borgato]

@fabiobrz I think we can merge now...

[fabiobrz]

Hi @tommaso-borgato and thanls for this PR introducing the new operator.
Great job! I added my comments, most of them being just minor fixes, I'd say.

BTW - could you please add the documentation for this new provisioner to the README and update this PR title?

[tommaso-borgato]

@fabiobrz thank you for your review! I answered all your questions, perhaps some answers might have some followup on your side....

[fabiobrz]

Thanks for addressing my comments @tommaso-borgato !

I resolved many of them and dropped questions about the ones we still need to clarify.
That being said, great job. We only need to fix the provisioner test(s). 🙂

[fabiobrz]

Thanks again for your work on this PR, @tommaso-borgato - changes LGTM, approving and merging!

BTW - re https://github.com/Intersmash/intersmash/pull/57/files#r1223062806 - let's file an issue as soon as you have some time.