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

Tools/Scripts/webkitpy/common/system/user_unittest.py

 # Copyright (C) 2010 Research in Motion Ltd. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * 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.
 #    * Neither the name of Research in Motion Ltd. nor the names of its
 # contributors may be used to endorse or promote products derived from
 # this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "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
 # OWNER OR CONTRIBUTORS 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 webkitpy.thirdparty.unittest2 as unittest
+import unittest
 
 from webkitpy.common.system.outputcapture import OutputCapture
 from webkitpy.common.system.user import User
 
 class UserTest(unittest.TestCase):
 
     example_user_response = "example user response"
 
     def test_prompt_repeat(self):
         self.repeatsRemaining = 2
@@ skipping 90 matching lines @@
     def test_warn_if_application_is_xcode(self):
         output = OutputCapture()
         user = User()
         output.assert_outputs(self, user._warn_if_application_is_xcode, ["TextMate"])
         output.assert_outputs(self, user._warn_if_application_is_xcode, ["/Applications/TextMate.app"])
         output.assert_outputs(self, user._warn_if_application_is_xcode, ["XCode"])  # case sensitive matching
 
         xcode_warning = "Instead of using Xcode.app, consider using EDITOR=\"xed --wait\".\n"
         output.assert_outputs(self, user._warn_if_application_is_xcode, ["Xcode"], expected_stdout=xcode_warning)
         output.assert_outputs(self, user._warn_if_application_is_xcode, ["/Developer/Applications/Xcode.app"], expected_stdout=xcode_warning)