Add gsutil 4.13 to telemetry/third_party

tools/telemetry/third_party/gsutil/gslib/tests/testcase/__init__.py

-# Copyright 2014 Google Inc. All rights reserved.
+# -*- coding: utf-8 -*-
+# Copyright 2013 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+"""Contains test case base classes for gsutil tests."""
 
-import sys  # pragma: no cover
+from __future__ import absolute_import
 
-from typ import main  # pragma: no cover
-
-
-if __name__ == '__main__':  # pragma: no cover
-    sys.exit(main())
+from gslib.tests.testcase.integration_testcase import GsUtilIntegrationTestCase
+from gslib.tests.testcase.unit_testcase import GsUtilUnitTestCase