Rest Sample Enhancement (#328)

* force rest protocol in IT

* add ASF header
diff --git a/dubbo-samples-async/dubbo-samples-async-onerror/src/test/java/org/apache/dubbo/samples/governance/AsyncServiceIT.java b/dubbo-samples-async/dubbo-samples-async-onerror/src/test/java/org/apache/dubbo/samples/governance/AsyncServiceIT.java
index 548bb99..9a6d4da 100644
--- a/dubbo-samples-async/dubbo-samples-async-onerror/src/test/java/org/apache/dubbo/samples/governance/AsyncServiceIT.java
+++ b/dubbo-samples-async/dubbo-samples-async-onerror/src/test/java/org/apache/dubbo/samples/governance/AsyncServiceIT.java
@@ -1,3 +1,21 @@
+/*
+ *
+ *   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.samples.governance;
 
 import org.apache.dubbo.rpc.RpcContext;
diff --git a/dubbo-samples-rest/src/main/resources/spring/rest-consumer.xml b/dubbo-samples-rest/src/main/resources/spring/rest-consumer.xml
index 9e2446c..64ba826 100644
--- a/dubbo-samples-rest/src/main/resources/spring/rest-consumer.xml
+++ b/dubbo-samples-rest/src/main/resources/spring/rest-consumer.xml
@@ -27,7 +27,7 @@
     <dubbo:registry address="zookeeper://${zookeeper.address:127.0.0.1}:2181"/>
 
     <dubbo:reference id="anotherUserRestService"
-                     interface="org.apache.dubbo.samples.rest.api.facade.AnotherUserRestService"/>
+                     interface="org.apache.dubbo.samples.rest.api.facade.AnotherUserRestService" protocol="rest"/>
 
     <!-- directly connect to provider to simulate the access to non-dubbo rest services -->
     <!--<dubbo:reference id="anotherUserRestService" interface="org.apache.dubbo.demo.user.facade.AnotherUserRestService" url="rest://localhost:8888/services/"/>-->
diff --git a/dubbo-samples-scala/src/test/scala/org/apache/dubbo/samples/scala/ScalaServicesIT.scala b/dubbo-samples-scala/src/test/scala/org/apache/dubbo/samples/scala/ScalaServicesIT.scala
index 37bf29f..09c9e7a 100644
--- a/dubbo-samples-scala/src/test/scala/org/apache/dubbo/samples/scala/ScalaServicesIT.scala
+++ b/dubbo-samples-scala/src/test/scala/org/apache/dubbo/samples/scala/ScalaServicesIT.scala
@@ -1,3 +1,22 @@
+/*
+ *
+ *   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.samples.scala
 
 import org.apache.dubbo.samples.scala.consumer.{ConsumerConfiguration, StringServiceConsumer}