[OpenSTEF 4.0] Setup SonarCloud

[bartpleiter]

As a OpenSTEF maintainer
I want to be able to automatically scan the project with SonarCloud
So that I can find issues that should be fixed

🌍 Background

SonarCloud stopped working (project not found anymore), resulting in failing badges in the readme.

Important

Changes should be done by forking OpenSTEF 4.0.0 tracking branch (release/v4.0.0) and then make a PR back onto release/v4.0.0 branch.
Please read the contributing guide before you start.

❗Priority (What if we don't do this?/Are there any deadlines? etc.)

Definition of Done:

✅ Acceptance criteria

• OpenSTEF added to sonarcloud again with the correct account (find out how to do this)
• Badges added back into the readme

📄 Documentation criteria:

Interfaces with other products and services

Update relevant confluence pages

🧪 Test criteria:

Unit tests written and passed

⌛ Dependencies:

N/A

🚀 Releasing:

N/A

Other information: