Add Registration.getServiceId()

spring-cloud-commons/src/main/java/org/springframework/cloud/client/serviceregistry/Registration.java

@@ -4,4 +4,9 @@ package org.springframework.cloud.client.serviceregistry;
  * @author Spencer Gibb
  */
 public interface Registration {
+
+	/**
+	 * @return the serviceId associated with this registration
+	 */
+	String getServiceId();
 }

spring-cloud-commons/src/test/java/org/springframework/cloud/client/serviceregistry/AbstractAutoServiceRegistrationTests.java

@@ -59,6 +59,10 @@ public class AbstractAutoServiceRegistrationTests {
 	}
 
 	public static class TestRegistration implements Registration {
+		@Override
+		public String getServiceId() {
+			return "testRegistration2";
+		}
 	}
 
 	public static class TestServiceRegistry implements ServiceRegistry<TestRegistration> {

spring-cloud-commons/src/test/java/org/springframework/cloud/client/serviceregistry/endpoint/ServiceRegistryEndpointTests.java

@@ -72,6 +72,10 @@ public class ServiceRegistryEndpointTests {
 		@Bean
 		Registration registration() {
 			return new Registration() {
+				@Override
+				public String getServiceId() {
+					return "testRegistration1";
+				}
 			};
 		}