Migrate and merge logging_utils from swarming_bot into client/utils.

appengine/swarming/swarming_bot/task_runner_test.py

 #!/usr/bin/env python
 # coding=utf-8
 # Copyright 2013 The Swarming Authors. All rights reserved.
 # Use of this source code is governed by the Apache v2.0 license that can be
 # found in the LICENSE file.
 
 import StringIO
 import base64
 import json
 import logging
 import os
 import signal
 import shutil
 import subprocess
 import sys
 import tempfile
 import time
 import unittest
 import zipfile
 
 import test_env
 test_env.setup_test_env()
 
 # Creates a server mock for functions in net.py.
 import net_utils
 
-import logging_utils
 from utils import file_path
+from utils import logging_utils
 from utils import subprocess42
 import task_runner
 import xsrf_client
 
 
 def compress_to_zip(files):
   out = StringIO.StringIO()
   with zipfile.ZipFile(out, 'w') as zip_file:
     for item, content in files.iteritems():
       zip_file.writestr(item, content)
@@ skipping 693 matching lines @@
           pass
 
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging_utils.prepare_logging(None)
   logging_utils.set_console_level(
       logging.DEBUG if '-v' in sys.argv else logging.CRITICAL+1)
   unittest.main()