@Bean
	public RocketMQTopicProvisioner rocketMQTopicProvisioner() {
		return new RocketMQTopicProvisioner();
	}
issue:https://github.com/alibaba/spring-cloud-alibaba/issues/1681 .

@author Timur Valiev
@author <a href="mailto:fangjian0423@gmail.com">Jim</a>
@author freeman
spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/autoconfigurate/RocketMQBinderAutoConfiguration.java