Don't provide "default" implementation in RegistryEndpointProvider interface

[chanseokoh]

It's generally considered not a good practice.

  default T handleHttpResponseException(ResponseException responseException)
      throws ResponseException, RegistryErrorException {
    throw responseException;
  }

Each RegistryEndpointProvider can just throw the given exception if not interested in it. The Javadoc of the interface can make this clear.