Use update_wrapper in lazy_property update attribute info

lib/tfw/decorators/lazy_property.py

@@ -1,6 +1,8 @@
 # Copyright (C) 2018 Avatao.com Innovative Learning Kft.
 # All Rights Reserved. See LICENSE file for details.
 
+from functools import update_wrapper
+
 
 class lazy_property:
     """
@@ -9,7 +11,7 @@ class lazy_property:
     """
     def __init__(self, func):
         self.func = func
-        self.__doc__ = func.__doc__
+        update_wrapper(self, func)
 
     def __get__(self, instance, owner):
         if instance is None: