Fix TypeError for pytest.skip()

pytests skip() method doesn't have a 'reason' parameter.
This fixes:

  TypeError: skip() got an unexpected keyword argument 'reason'

--HG--
branch : fix-type-error-skip-reason

setuptools/tests/test_integration.py

@@ -28,7 +28,7 @@ def setup_module(module):
     try:
         urlopen('https://pypi.python.org/pypi')
     except Exception as exc:
-        pytest.skip(reason=str(exc))
+        pytest.skip(str(exc))
 
 
 @pytest.fixture