[Findit] Extending versioned_model.py to support versioning multiple entities of the same class.

appengine/findit/handlers/flake/test/check_flake_test.py

 # Copyright 2016 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.
 
 import re
 
 import webapp2
 import webtest
 
 from handlers.flake import check_flake
@@ skipping 62 matching lines @@
     build_number = '123'
     step_name = 's'
     test_name = 't'
     success_rate = .9
     status = analysis_status.PENDING
 
     master_flake_analysis = self._CreateAndSaveMasterFlakeAnalysis(
         master_name, builder_name, build_number, step_name,
         test_name, status)
     master_flake_analysis.build_numbers.append(int(build_number))
-    master_flake_analysis.success_rates.append(success_rate)
+    master_flake_analysis.pass_rates.append(success_rate)
     master_flake_analysis.put()
 
     response = self.test_app.get('/waterfall/check-flake', params={
         'master_name': master_name,
         'builder_name': builder_name,
         'build_number': build_number,
         'step_name': step_name,
         'test_name': test_name,
         'format': 'json'})
 
     self.assertEquals(200, response.status_int)
     expected_check_flake_result ={
-        'success_rates': [[int(build_number), success_rate]],
+        'pass_rates': [[int(build_number), success_rate]],
         'analysis_status': STATUS_TO_DESCRIPTION.get(
             master_flake_analysis.status),
         'master_name': master_name,
         'builder_name': builder_name,
         'build_number': int(build_number),
         'step_name': step_name,
         'test_name': test_name,
         'suspected_flake_build_number': None
     }
     self.assertEqual(expected_check_flake_result, response.json_body)