ISSUE-694 code style fix

Author: eutkin

services/src/test/java/io/scalecube/services/sut/AnnotationServiceImpl.java

@@ -7,6 +7,7 @@
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.ReplayProcessor;
 
+@SuppressWarnings("unused")
 public class AnnotationServiceImpl implements AnnotationService {
 
   private ReplayProcessor<ServiceDiscoveryEvent> serviceDiscoveryEvents;