add license and revert demo changes

dubbo-common/src/main/java/org/apache/dubbo/common/threadpool/manager/Ring.java

@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.apache.dubbo.common.threadpool.manager;
 
 import java.util.Collections;

dubbo-demo/dubbo-demo-xml/dubbo-demo-xml-consumer/src/main/resources/spring/dubbo-consumer.xml

@@ -27,6 +27,6 @@
 
     <!-- generate proxy for the remote service, then demoService can be used in the same way as the
     local regular interface -->
-    <dubbo:reference timeout="600000" id="demoService" check="false" interface="org.apache.dubbo.demo.DemoService"/>
+    <dubbo:reference id="demoService" check="false" interface="org.apache.dubbo.demo.DemoService"/>
 
 </beans>

dubbo-demo/dubbo-demo-xml/dubbo-demo-xml-provider/src/main/java/org/apache/dubbo/demo/provider/DemoServiceImpl.java

@@ -30,11 +30,6 @@ public class DemoServiceImpl implements DemoService {
     @Override
     public String sayHello(String name) {
         logger.info("Hello " + name + ", request from consumer: " + RpcContext.getContext().getRemoteAddress());
-        try {
-            Thread.sleep(10000);
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
         return "Hello " + name + ", response from provider: " + RpcContext.getContext().getLocalAddress();
     }