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

appengine/findit/waterfall/suspected_cl_util.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.
 
 from google.appengine.ext import ndb
 
-from common import time_util
 from common.waterfall import failure_type
+from lib import time_util
 from model import analysis_approach_type
 from model.wf_suspected_cl import WfSuspectedCL
 from waterfall import build_util
 
 
 def GetCLInfo(cl_info_str):
   """Gets CL's repo_name and revision."""
   return cl_info_str.split('/')
 
 
@@ skipping 113 matching lines @@
       cl_from_analyzed_build = cl_from_first_failed_build
 
   confidence = GetSuspectedCLConfidenceScore(
       confidences, cl_from_analyzed_build)
   approach = (
       analysis_approach_type.TRY_JOB if analysis_approach_type.TRY_JOB in
       cl_from_analyzed_build['approaches'] else
       analysis_approach_type.HEURISTIC)
 
   return confidence, approach