rocketmq multi-broker offset error code style

spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/test/java/com/alibaba/cloud/stream/binder/rocketmq/RocketMQMessageConverterSupportTest.java

@@ -1,8 +1,25 @@
+/*
+ * Copyright 2013-2018 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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 com.alibaba.cloud.stream.binder.rocketmq;
 
 import com.alibaba.cloud.stream.binder.rocketmq.support.RocketMQMessageConverterSupport;
 import org.apache.rocketmq.common.message.MessageConst;
 import org.junit.jupiter.api.Test;
+
 import org.springframework.messaging.Message;
 import org.springframework.messaging.support.MessageBuilder;