PortalTransforms: Avoid hack to import module, instead use `fromlist` __import__ parameter.

product/PortalTransforms/Transform.py

@@ -21,14 +21,7 @@ from Products.PortalTransforms.transforms.broken import BrokenTransform
 
 def import_from_name(module_name):
     """ import and return a module by its name """
-    __traceback_info__ = (module_name, )
-    m = __import__(module_name)
-    try:
-        for sub in module_name.split('.')[1:]:
-            m = getattr(m, sub)
-    except AttributeError, e:
-        raise ImportError(str(e))
-    return m
+    return __import__(module_name, {}, {}, module_name)
 
 def make_config_persistent(kwargs):
     """ iterates on the given dictionnary and replace list by persistent list,