create integration tests for Confluence data reading

[tkonheiser]

User story

1. As a project team
2. We want / need tests for the Confluence data reading functions
3. So that we can ensure a higher quality software.

Acceptance criteria

• integration tests for Confluence reading are created
• testcases cover all used interfaces and API calls in the Confluence context
• created tests are included in the testing pipeline

Definition of done (DoD)

• Acceptance criteria are met.
• Work products are uploaded to the Github repository.
• A pull request is created for each related branch.
• The work products in the pull requests are reviewed.
• The corresponding branches are merged and closed.
• The bill of materials section of the planning documents is updated.
• All defined conventions are complied with.

DoD general criteria

• Feature has been fully implemented
• Feature has been merged into the mainline
• All acceptance criteria were met
• Product owner approved features
• All tests are passing
• Developers agreed to release