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

appengine/findit/model/flake/flake_swarming_task.py

Index: appengine/findit/model/flake/flake_swarming_task.py
diff --git a/appengine/findit/model/flake/flake_swarming_task.py b/appengine/findit/model/flake/flake_swarming_task.py
index 8c4f7803d2483d0db89d8ad84184de7c777188a5..ea1c8f334e6232d8504f801627901f4f4ba2dabc 100644
--- a/appengine/findit/model/flake/flake_swarming_task.py
+++ b/appengine/findit/model/flake/flake_swarming_task.py
@@ -55,6 +55,16 @@ class FlakeSwarmingTask(BaseSwarmingTask, BaseBuildModel):
     return FlakeSwarmingTask._CreateKey(
         master_name, builder_name, build_number, step_name, test_name).get()
 
+  def ResultsToDict(self):
+    return {
+        'created_time': self.created_time,
+        'started_time': self.started_time,
+        'completed_time': self.completed_time,
+        'build_number': self.build_number,
+        'number_of_iterations': self.tries,
+        'number_of_passes': self.successes
+    }
+
   # Number of runs the test passed.
   successes = ndb.IntegerProperty(default=0, indexed=False)
   # How many times the test was rerun.