koan fails to start in RHEL 6

Issue

• koan is dying on my system

  # koan -r -s 169.82.114.235
  - looking for Cobbler at http://169.82.114.235/cobbler_api
  <type 'exceptions.NameError'>
  global name 'CX' is not defined
    File "/usr/lib/python2.6/site-packages/koan/app.py", line 216, in main
      k.run()
     File "/usr/lib/python2.6/site-packages/koan/app.py", line 318, in run
      self.system = self.autodetect_system(allow_interactive=self.live_cd)
     File "/usr/lib/python2.6/site-packages/koan/app.py", line 388, in autodetect_system
      raise CX("the rhpl module is required to autodetect a system.  Your OS does not have this, please manually specify --profile or --system")