Create proper wrapper scripts to decouple from swarm_client.

scripts/slave/unittests/get_swarm_results_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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 logging
 import sys
 import unittest
 
 import test_env  # pylint: disable=W0403,W0611
@@ skipping 10 matching lines @@
     raise NotImplementedError()
 
   @staticmethod
   def get_test_keys(url, test_name):
     raise NotImplementedError()
 
 
 sys.modules['swarm_get_results'] = FakeSwarmGetResultsModule()
 
 
-import slave.swarming.get_swarm_results as swarm_results
+import slave.swarming.get_swarm_results_shim as swarm_results
 
 
 RUN_TEST_OUTPUT = (
 """[----------] 2 tests from StaticCookiePolicyTest
 [ RUN      ] StaticCookiePolicyTest.AllowAllCookiesTest
 [       OK ] StaticCookiePolicyTest.AllowAllCookiesTest (0 ms)
 [ RUN      ] StaticCookiePolicyTest.BlockAllCookiesTest
 [       OK ] StaticCookiePolicyTest.BlockAllCookiesTest (0 ms)
 [----------] 2 tests from StaticCookiePolicyTest (0 ms total)
 
@@ skipping 92 matching lines @@
     actual = swarm_results.gen_summary_output([], 0, [1])
     self.assertEqual((expected, 1), actual)
 
 
 if __name__ == '__main__':
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   unittest.main()