[Findit] Renaming version property in versioned_model.py to avoid conflicts with base_analysis.py

appengine/findit/model/versioned_model.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Provides a model to support versioned entities in datastore.
 
 Idea: use a root model entity to keep track of the most recent version of a
 versioned entity, and make the versioned entities and the root model entity in
 the same entity group so that they could be read and written in a transaction.
 """
@@ skipping 19 matching lines @@
   versioned entity, use Create(key) with optional key to differentiate between
   multiple unique entities of the same subclass. Use GetVersion() to read and
   Save() to write.
   """
 
   @property
   def _root_id(self):
     return self.key.pairs()[0][1] if self.key else None
 
   @property
-  def version(self):
+  def version_number(self):
     # Ndb treats key.integer_id() of 0 as None, so default to 0.
     return self.key.integer_id() or 0 if self.key else 0
 
   @classmethod
   def Create(cls, key=None):
     """Creates an instance of cls that is to become the first version.
 
     The calling function of Create() should be responsible first for checking
     no previous version of the proposed entity already exists.
 
@@ skipping 104 matching lines @@
 
       @classmethod
       def _get_kind(cls):
         return root_model_name
 
     return _RootModel
 
   @classmethod
   def _GetRootKey(cls, key=None):
     return ndb.Key(cls._GetRootModel(), key if key is not None else 1)