feat(funcs): 优化函数热加载

- 优化函数热加载模块funcs.py（由字典反射改为装饰器）
- 修复bug

TestCases/answer/test_1_status.yaml

@@ -12,25 +12,20 @@ request:
     Referer: http://119.91.19.171:40065/users/login
     Accept-Encoding: gzip, deflate
 extract: # 提取变量
-  code:
-    - "json"
-    - "$.code"
-    - 0
   msg:
     - "json"
     - "$.msg"
     - 0
 
-
 validate:
   equals: # 断言相等
     状态码等于200:
       - Success.
       - ${msg}
 
-parametrize: # 数据驱动测试
-  - [ "title","username","password","code" ] # 变量名
-  - [ "测试1","user1","pass1","code1" ] # 变量值
-  - [ "测试2","user2","pass2","code2" ] # 变量值
-  - [ "测试3","user3","pass3","code3" ] # 变量值
-  - [ "测试4","user4","pass4","code4" ] # 变量值
+#parametrize: # 数据驱动测试
+#  - [ "title","username","password","msg" ] # 变量名
+#  - [ "测试1","user1","pass1","200" ] # 变量值
+#  - [ "测试2","user2","pass2","300" ] # 变量值
+#  - [ "测试3","user3","pass3","200" ] # 变量值
+#  - [ "测试4","user4","pass4","200" ] # 变量值