代码整理，注释增加

pay-java-common/src/main/java/com/egzosn/pay/common/api/BasePayConfigStorage.java

@@ -31,7 +31,7 @@ public abstract class BasePayConfigStorage implements PayConfigStorage{
     /**
      * 同步回调地址，支付完成后展示的页面
      */
-    private volatile  String returnUrl;;
+    private volatile  String returnUrl;
     /**
      * 签名加密类型
      */

pay-java-common/src/main/java/com/egzosn/pay/common/api/PayMessageRouterRule.java

@@ -27,8 +27,10 @@ public class PayMessageRouterRule {
 
 
     private final PayMessageRouter routerBuilder;
-
-    private boolean async = true;
+    /**
+     * 默认同步
+     */
+    private boolean async = false;
 
     /**
      * 消息类型