1：优化商户管理页面BUG

2：优化应用关闭页面
3：完成支付订单CURD 以及单元测试
4：将 Element UI 从 2.15.0 升级至 2.15.6

yudao-admin-server/src/test/resources/sql/clean.sql

@@ -28,4 +28,5 @@ DELETE FROM "sys_social_user";
 -- pay 开头的 DB
 DELETE FROM pay_merchant;
 DELETE FROM pay_app;
-DELETE FROM pay_channel
+DELETE FROM pay_channel;
+delete from pay_order;