[Findit] Re-org code.

appengine/findit/waterfall/test/buildbot_test.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.
 
 from datetime import datetime
 import mock
 import os
 import unittest
 
-from common.retry_http_client import RetryHttpClient
+from libs.http.retry_http_client import RetryHttpClient
 from waterfall import buildbot
 
 
 class DummyHttpClient(RetryHttpClient):
 
   def __init__(self, status_code, response_content):
     self.status_code = status_code
     self.response_content = response_content
     self.requests = []
 
@@ skipping 420 matching lines @@
 
     expected_blame_list = [
         '449cdbd05616de91fcf7e8b4282e300336d6d7c5',
         '6addffac2601ab1083a55d085847d9bf8e66da02'
     ]
 
     build_info = buildbot.ExtractBuildInfo(
         master_name, builder_name, build_number, build_data)
 
     self.assertEqual(expected_blame_list, build_info.blame_list)