[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 gitiles.git_repository import GitRepository
 from common.waterfall import failure_type
 from model import analysis_status
 from model import result_status
 from model.wf_analysis import WfAnalysis
 from model.wf_try_job import WfTryJob
 from model.wf_try_job_data import WfTryJobData
 from waterfall import identify_try_job_culprit_pipeline
 from waterfall.identify_try_job_culprit_pipeline import(
     IdentifyTryJobCulpritPipeline)
 
@@ skipping 1044 matching lines @@
         self.started = True
 
     self.mock(
         identify_try_job_culprit_pipeline, 'SendNotificationForCulpritPipeline',
         Mocked_SendNotificationForCulpritPipeline)
 
     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)
+    self.assertTrue(instances[0].started)