Skip tests for Python3.

caucase/test.py

@@ -305,6 +305,7 @@ def captureStdout():
   finally:
     sys.stdout = orig_stdout
 
+@unittest.skipIf(sys.version_info >= (3, ), 'Caucase currently supports python 2 only')
 class CaucaseTest(unittest.TestCase):
   """
   Test a complete caucase setup: spawn a caucase-http server on CAUCASE_NETLOC