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

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

Index: appengine/findit/handlers/flake/test/check_flake_test.py
diff --git a/appengine/findit/handlers/flake/test/check_flake_test.py b/appengine/findit/handlers/flake/test/check_flake_test.py
index 742c5247c9dbe91098a9450368ac825ff4fa6e45..fc9b80a800250928ecaa72f49f12d0656d9ec4a3 100644
--- a/appengine/findit/handlers/flake/test/check_flake_test.py
+++ b/appengine/findit/handlers/flake/test/check_flake_test.py
@@ -80,7 +80,7 @@ class CheckFlakeTest(wf_testcase.WaterfallTestCase):
         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={
@@ -93,7 +93,7 @@ class CheckFlakeTest(wf_testcase.WaterfallTestCase):
 
     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,