added exponential timeout when trying to reconnect if authentication error

import threading

import socket

from time import sleep

from math import exp

try:

    import daemon

        logging.info('Connected to server %s' % options['address'])

    def authentication():

        timeout = 1

        login = options['login'].replace('$HOSTNAME', socket.gethostname())

        while node.manager.is_running():

            try:

                logging.critical('Authentication error: %s' % error)

                sleep(2)

            else:

                timeout += 0.1

                print exp(timeout)

                sleep(exp(timeout))

                logging.info('Authenticated to server')

                break