fix webapi 未设置代码生成 Load加载数据报错，MVC页面没有代码生成界面 https://gitee.com/yubaolee/OpenAuth.Core/issues/I4RLEP

OpenAuth.App/Test/TestDbExtension.cs

@@ -16,7 +16,7 @@ namespace OpenAuth.App.Test
            
             var app = _autofacServiceProvider.GetService<DbExtension>();
 
-            var result = app.GetProperties("Category");
+            var result = app.GetTableColumnsFromDb("Category");
             Console.WriteLine(JsonHelper.Instance.Serialize(result));
         }