Keeping the REST-doc up to date when adding endpoints

Whenever you add a new REST-endpoint, the REST-documentation needs to be updated.

1. All Path/Query Params and Request Fields must be documented in the JavaDoc of the new endpoint

2. Compile taskana-rest-spring module

3. Add a REST-doc test

4. Add the new generated snippet of that REST-doc test to the rest-api.adoc file