Update appengine-pipelines before files API turndown.

appengine/findit/waterfall/test/extract_signal_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.
 
 import os
 
-from pipeline_utils.appengine_third_party_pipeline_src_pipeline import handlers
+from pipeline_utils.appengine_third_party_pipeline_python_src_pipeline \
+    import handlers
 from testing_utils import testing
 
 from model.wf_step import WfStep
 from waterfall import buildbot
 from waterfall import extractors
 from waterfall.extract_signal_pipeline import ExtractSignalPipeline
 
 
 class ExtractSignalPipelineTest(testing.AppengineTestCase):
   app_module = handlers._APP
@@ skipping 255 matching lines @@
   def testBailOutIfNoValidChromiumRevision(self):
     failure_info = {
         'failed': True,
         'chromium_revision': None,
     }
     expected_signals = {}
 
     pipeline = ExtractSignalPipeline()
     signals = pipeline.run(failure_info)
     self.assertEqual(expected_signals, signals)