Update appengine-pipelines before files API turndown.

appengine/findit/waterfall/detect_first_failure_pipeline.py

 # Copyright 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 collections
 from datetime import datetime
 import logging
 import random
 import time
 
 from google.appengine.api import memcache
 
-from pipeline_utils.appengine_third_party_pipeline_src_pipeline import pipeline
+from pipeline_utils.appengine_third_party_pipeline_python_src_pipeline \
+    import pipeline
 
 from common.http_client_appengine import HttpClientAppengine as HttpClient
 from model.wf_build import WfBuild
 from model.wf_analysis import WfAnalysis
 from waterfall import buildbot
 from waterfall.base_pipeline import BasePipeline
 from waterfall import lock_util
 
 
 _MAX_BUILDS_TO_CHECK = 20
@@ skipping 231 matching lines @@
     self._SaveBlamelistAndChromiumRevisionIntoDict(build_info, builds)
 
     failed_steps = self._CreateADictOfFailedSteps(build_info)
 
     self._CheckForFirstKnownFailure(
         master_name, builder_name, build_number, failed_steps, builds)
 
     failure_info['builds'] = builds
     failure_info['failed_steps'] = failed_steps
     return failure_info