Setting "response_mode" in AuthorizationRequest does not work with keycloak-authz-client

Issue

• When AuthorizationRequest.Metadata#setResponseMode is set to "decision", response_mode is not sent to the server when using keycloak-authz-client

       AuthorizationRequest request = new AuthorizationRequest();
        request.addPermission(resource, scope);
        request.setMetadata(metadata);
        request.getMetadata().setResponseMode("decision");