Support creation of KB credentials by following endpoint:
Sample request body:
More details can be found in the dedicated section of "Spike: MODKBEKBJ-390 - describe design for "Single tenant multiple EBSCO KBs" scenario"
- KB credentials entity created
- an error is returned if KB API Credentials are invalid
- the endpoint created and works according to the requirements
- the endpoint is covered with unit tests
- API tests created to cover endpoint functionality