code: def condor_stop(external_id):
      
      failure_message = None
      try:
          check_call(('condor_rm', external_id))
      except CalledProcessError:
          failure_message = "condor_rm failed"
      except Exception as e:
          "error encountered calling condor_rm: %s" % e
      return failure_message
docs: Stop running condor job and return a failure_message if this
      fails.