Build capable test provider

[ldeichmann]

We need a provider that can handle everything that can be done for "our" requirements.

Improvement Idea: Let the CI-Server run SDCcc against SDCri.

In order to do that, one would have to build a t2iapi server for SDCri that supports as many manipulations as possible create the setup for such an integration test in CI.

The benefits would be:

• a continuous reading about how well SDCcc and SDCri fit together (of course, not all tests will run green at the beginning, but the ones that do fail will provide useful indications on either manipulations that are implemented incorrectly or at standard-compliance-issues in SDCri)
• once all manipulations are implemented: An example t2iapi server implementation that is highly useful for implementers of t2iapi servers for users.
• once all tests run green: A continuous guarantee of standard-compliance for SDCri and a continuous guarantee that SDCcc's test suite is satisfiable.