reorder import statement in seata starter to pass checkstyle

spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-seata/src/main/java/com/alibaba/cloud/seata/rest/SeataRestTemplateInterceptorAfterPropertiesSet.java

@@ -16,15 +16,15 @@
 
 package com.alibaba.cloud.seata.rest;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.client.ClientHttpRequestInterceptor;
 import org.springframework.web.client.RestTemplate;
 
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-
 /**
  * @author ZhangZhi
  */