'Updates a Balancer\'s connection throttle.  This method blocks until
the update request has been processed and the balancer is in a
RUNNING state again.
:param balancer: Balancer to update connection throttle on.
:type  balancer: :class:`LoadBalancer`
:param connection_throttle: Connection Throttle for the balancer.
:type  connection_throttle: :class:`RackspaceConnectionThrottle`
:return: Updated Balancer.
:rtype: :class:`LoadBalancer`'

def ex_update_balancer_connection_throttle(self, balancer, connection_throttle):

    accepted = self.ex_update_balancer_connection_throttle_no_poll(balancer, connection_throttle)
    if (not accepted):
        msg = 'Update    connection    throttle    request    not    accepted'
        raise LibcloudError(msg, driver=self)
    return self._get_updated_balancer(balancer)
