Remove thirdparty/unittest2 from webkitpy and require python2.7.

Tools/Scripts/webkitpy/w3c/test_parser_unittest.py

-#!/usr/bin/env python
-
 # Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 #
 # 1. Redistributions of source code must retain the above
 #    copyright notice, this list of conditions and the following
 #    disclaimer.
 # 2. Redistributions in binary form must reproduce the above
 #    copyright notice, this list of conditions and the following
 #    disclaimer in the documentation and/or other materials
 #    provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
 # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
 # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 # PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 # TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 
 import os
-import webkitpy.thirdparty.unittest2 as unittest
+import unittest
 
 from webkitpy.common.system.outputcapture import OutputCapture
 from webkitpy.w3c.test_parser import TestParser
 
 
 options = {'all': False, 'no_overwrite': False}
 
 
 class TestParserTest(unittest.TestCase):
 
@@ skipping 166 matching lines @@
         test_info = parser.analyze_test(test_contents=test_html)
 
         self.assertEqual(test_info, None, 'test should have been skipped')
 
     def test_analyze_non_html_file(self):
         """ Tests analyze_test() with a file that has no html"""
         # FIXME: use a mock filesystem
         parser = TestParser(options, os.path.join(os.path.dirname(__file__), 'test_parser.py'))
         test_info = parser.analyze_test()
         self.assertEqual(test_info, None, 'no tests should have been found in this file')