Update appengine-pipelines before files API turndown.

appengine_module/pipeline_utils/pipelines.py

 # Copyright (c) 2014 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 google.appengine.api import app_identity
 
-from appengine_third_party_pipeline_src_pipeline import pipeline
+from appengine_third_party_pipeline_python_src_pipeline import pipeline
 
 
 class AppenginePipeline(pipeline.Pipeline):
   def send_result_email(self):  # pragma: no cover
     """We override this so it doesn't email on completion."""
     pass
 
   def pipeline_status_url(self):  # pragma: no cover
     """Returns a URL to look up the status of the pipeline."""
     scheme = 'https'
     if os.environ['APPLICATION_ID'].startswith('dev'):
       scheme = 'http'
     return '%s://%s/_ah/pipeline/status?root=%s&auto=false' % (
         scheme,
         app_identity.get_default_version_hostname(),
         self.root_pipeline_id)