编译报错

[bravoban]

BUG REPORT

1. Please describe the issue you observed:

org.apache.rocketmq.spring.support.RocketMQUtil#createDefaultMQProducer
这个方法存在编译错误，看起来是构建org.apache.rocketmq.client.trace.AsyncTraceDispatcher对象时，缺少了参数 batchNum

3. Please tell us about your environment:
   与环境无关，源码本身的内容
   版本：
   org.apache.rocketmq
   rocketmq-spring-boot-starter
   2.3.1
   
4. Other information (e.g. detailed explanation, logs, related issues, suggestions how to fix, etc):
   补充好参数就行了，或者修改org.apache.rocketmq.client.trace.AsyncTraceDispatcher 构造函数