erp5_mrp_change_managment: Fix concurrency problem when editing the same key multiple times

bt5/erp5_mrp_change_managment/SkinTemplateItem/portal_skins/erp5_mrp_change_managment/TransformationChange_checkApplyResult.py

@@ -103,10 +103,7 @@ def getExpectedTransformationTransformedResourceDict(transformation_change_list,
     for key, value_list in base_dict.iteritems():
       for ttr_value in value_list:
         if 'transformation_change' in ttr_value:
-          if key not in expected_dict:
-            expected_dict[key] = []
-          expected_dict[key].append(ttr_value)
-  
+          expected_dict[key] = [ttr_value]
   return expected_dict