[Findit] Factoring the gitiles (etc) stuff out into its own directory

appengine/findit/waterfall/test/identify_try_job_culprit_pipeline_test.py

 # Copyright 2015 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 testing_utils import testing
 
-from common.git_repository import GitRepository
+from lib.gitiles.git_repository import GitRepository
 from common.waterfall import failure_type
 from model import analysis_approach_type
 from model import analysis_status
 from model import result_status
 from model.base_build_model import BaseBuildModel
 from model.wf_analysis import WfAnalysis
 from model.wf_suspected_cl import WfSuspectedCL
 from model.wf_try_job import WfTryJob
 from model.wf_try_job_data import WfTryJobData
 from waterfall import identify_try_job_culprit_pipeline
@@ skipping 1149 matching lines @@
 
     identify_try_job_culprit_pipeline._NotifyCulprits(
         master_name, builder_name, build_number, None,
         heuristic_cls, compile_suspected_cl)
     self.assertEqual(1, len(instances))
     self.assertTrue(instances[0].started)
 
   def testGetTestFailureCausedByCLResultNone(self):
     self.assertIsNone(
         identify_try_job_culprit_pipeline._GetTestFailureCausedByCL(None))