[Findit] Re-org code.

appengine/findit/gae_libs/model/versioned_config.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.
 
 """Versioned singleton entity with the global configuration."""
 
 import logging
 
 from google.appengine.ext import ndb
 
-from model.versioned_model import VersionedModel
+from gae_libs.model.versioned_model import VersionedModel
 
 
 class VersionedConfig(VersionedModel):
   """Singleton entity with the global configuration of the service.
 
   All changes are stored in the revision log.
   """
 
   # When this revision of configuration was created.
   updated_ts = ndb.DateTimeProperty(indexed=False, auto_now=True)
@@ skipping 19 matching lines @@
         setattr(self, k, v)
         dirty = True
 
     if dirty:
       user_name = user.email().split('@')[0]
       self.updated_by = user_name
       self.Save()
       logging.info('Config %s was updated by %s', self.__class__, user_name)
 
     return dirty