Update namespace method

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

@@ -1,16 +1,10 @@
 package org.springframework.cloud.client.serviceregistry;
 
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
-
-import javax.annotation.PreDestroy;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-
 import org.springframework.beans.BeansException;
+import org.springframework.boot.web.context.ConfigurableWebServerApplicationContext;
 import org.springframework.boot.web.context.WebServerInitializedEvent;
-import org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext;
 import org.springframework.cloud.client.discovery.ManagementServerPortUtils;
 import org.springframework.cloud.client.discovery.event.InstanceRegisteredEvent;
 import org.springframework.context.ApplicationContext;
@@ -18,6 +12,10 @@ import org.springframework.context.ApplicationContextAware;
 import org.springframework.context.event.EventListener;
 import org.springframework.core.env.Environment;
 
+import javax.annotation.PreDestroy;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
 /**
  * Lifecycle methods that may be useful and common to {@link ServiceRegistry}
  * implementations.
@@ -65,9 +63,9 @@ public abstract class AbstractAutoServiceRegistration<R extends Registration>
 	@EventListener(WebServerInitializedEvent.class)
 	public void bind(WebServerInitializedEvent event) {
 		ApplicationContext context = event.getApplicationContext();
-		if (context instanceof ServletWebServerApplicationContext) {
+		if (context instanceof ConfigurableWebServerApplicationContext) {
 			if ("management".equals(
-					((ServletWebServerApplicationContext) context).getNamespace())) {
+					((ConfigurableWebServerApplicationContext) context).getServerNamespace())) {
 				return;
 			}
 		}