docs: def __RemoteExecuteHelper(args):
    """ Helper for multiprocessing. """
    cmd, hostname, ssh_key = args
    #Random.atfork()  # needed to fix bug in old python 2.6 interpreters
    private_key = paramiko.RSAKey.from_private_key(StringIO.StringIO(ssh_key))
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    while True:
        try:
            client.connect(hostname, username='ubuntu', pkey=private_key, 
                           allow_agent=False, look_for_keys=False)
            break
        except socket.error as e:
            print '.'
            time.sleep(5)
        except paramiko.AuthenticationException as e:
            print e
            time.sleep(5)
    channel = client.get_transport().open_session()
    channel.exec_command(cmd)
    exit_code = channel.recv_exit_status()
    output = channel.recv(1000000)
    client.close()
    return exit_code, output