[Findit] Re-org code.

appengine/findit/waterfall/test/swarming_util_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 collections
 import json
 import os
 import urllib
 import zlib
 
-from common.retry_http_client import RetryHttpClient
+from libs.http.retry_http_client import RetryHttpClient
 from model.wf_config import FinditConfig
 from model.wf_step import WfStep
 from waterfall import swarming_util
 from waterfall import waterfall_config
 from waterfall.swarming_task_request import SwarmingTaskRequest
 from waterfall.test import wf_testcase
 
 
 class SwarmingHttpClient(RetryHttpClient):
 
@@ skipping 553 matching lines @@
 
   def testGetTagValueInvalidTag(self):
     tags = ['a:1', 'b:2']
     self.assertIsNone(swarming_util.GetTagValue(tags, 'c'))
 
   def testGenerateIsolatedDataOutputsrefNone(self):
     self.assertEqual({}, swarming_util._GenerateIsolatedData(None))
 
   def testFetchOutputJsonInfoFromIsolatedServerReturnNone(self):
     self.assertIsNone(swarming_util._FetchOutputJsonInfoFromIsolatedServer(
-        None, self.http_client))
+        None, self.http_client))