FOLIO-2875 we want to investigate options other than the multiple interface.
Provide a way for modules to implement a common interface, with some easy way to tell OKAPI which one we want to call.
- Should not require use of additional X-Okapi-* headers
- Must be able to depend on the interface
- It's use should be Optional
- Clients should not be required to know/determine the module Id in order to call a specific implementation of the interface.