Add panel service tests

[Agaba-derrick]

Pull Requests Requirements

• The PR title includes a brief description of the work done, including the
  Issue number if applicable.
• The PR includes a video showing the changes for the work done.
• The PR title follows conventional commit label standards.
• The changes confirm to the OpenElis Global x3 Styleguide and design
  documentation.
• The changes include tests or are validated by existing tests.
• I have read and agree to the Contributing Guidelines of this project.

Summary

Screenshots

[Add relevant screenshots here if applicable]

Related Issue

Add Integration Service tests #1224

Other

This is a WIP !