1、关联表删除额外的service。

2、service中删除mybatis plus 的操作，技术和业务解耦。

yudao-module-system/yudao-module-system-impl/src/test/resources/sql/clean.sql

@@ -4,6 +4,7 @@ DELETE FROM "system_role";
 DELETE FROM "system_role_menu";
 DELETE FROM "system_menu";
 DELETE FROM "system_user_role";
+DELETE FROM "system_user_post";
 DELETE FROM "system_dict_type";
 DELETE FROM "system_user_session";
 DELETE FROM "system_post";