[Predator] Move time_util from common/ to lib/, split code review related part to code_review_util

appengine/findit/waterfall/trigger_base_swarming_task_pipeline.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 copy
 import logging
 import time
 
-from common import time_util
 from common.http_client_appengine import HttpClientAppengine as HttpClient
 from common.pipeline_wrapper import BasePipeline
+from lib import time_util
 from model import analysis_status
 from waterfall import swarming_util
 from waterfall import waterfall_config
 
 
 class TriggerBaseSwarmingTaskPipeline(BasePipeline):  # pragma: no cover.
   """A pipeline to trigger a Swarming task to re-run selected tests of a step.
 
   This pipeline only supports test steps that run on Swarming and support the
   gtest filter.
@@ skipping 152 matching lines @@
     swarming_task = self._GetSwarmingTask(*call_args)
     swarming_task.task_id = task_id
     swarming_task.parameters['tests'] = tests
     swarming_task.parameters['iterations_to_rerun'] = iterations_to_rerun
     swarming_task.parameters['ref_name'] = swarming_util.GetTagValue(
         new_request.tags, 'ref_name')
     swarming_task.put()
 
     logging.info('A Swarming task was triggered:%s', task_id)
     return task_id