[Findit] Moving check flake parameters to config

appengine/findit/waterfall/trigger_flake_swarming_task_pipeline.py

-from google.appengine.ext import ndb
+# 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 logging
-
+from model.flake.flake_swarming_task import FlakeSwarmingTask
+from waterfall import waterfall_config
 from waterfall.trigger_base_swarming_task_pipeline import(
     TriggerBaseSwarmingTaskPipeline)
-from model.flake.flake_swarming_task import FlakeSwarmingTask
+
+
 class TriggerFlakeSwarmingTaskPipeline(TriggerBaseSwarmingTaskPipeline):
   """A pipeline to check if selected tests of a step are flaky.
 
   This pipeline only supports test steps that run on Swarming and support the
   gtest filter.
   """
-  #pylint: disable=arguments-differ
-  def _GetSwarmingTask(self,master_name, builder_name, build_number,
+
+  # pylint: disable=arguments-differ
+  def _GetSwarmingTask(self, master_name, builder_name, build_number,
                        step_name, test_name):
     # Get the appropriate kind of Swarming Task (Flake).
     swarming_task = FlakeSwarmingTask.Get(
         master_name, builder_name, build_number, step_name, test_name)
     return swarming_task
 
-  #pylint: disable=arguments-differ
+  # pylint: disable=arguments-differ
   def _CreateSwarmingTask(self, master_name, builder_name, build_number,
                           step_name, test_name):
     # Create the appropriate kind of Swarming Task (Flake).
     swarming_task = FlakeSwarmingTask.Create(
         master_name, builder_name, build_number, step_name, test_name)
     return swarming_task
 
   def _GetIterationsToRerun(self):
-    # How many times we want to run the swarming rerun?
-    return 10
+    return waterfall_config.GetCheckFlakeSettings().get('iterations_to_rerun')
 
   def _GetArgs(self, master_name, builder_name, build_number, step_name, tests):
-    test_name = tests[0] #only one test per pipeline
+    test_name = tests[0]  # Only one test per pipeline.
     return (master_name, builder_name, build_number, step_name, test_name)