'Disables a Balancer\'s custom error page, returning its error page to
the Rackspace-provided default.  This method blocks until the disable
request has been processed and the balancer is in a RUNNING state
again.
:param balancer: Balancer to disable the custom error page for.
:type  balancer: :class:`LoadBalancer`
:return: Updated Balancer.
:rtype: :class:`LoadBalancer`'

def ex_disable_balancer_custom_error_page(self, balancer):

    if (not self.ex_disable_balancer_custom_error_page_no_poll(balancer)):
        msg = 'Disable    custom    error    page    request    not    accepted'
        raise LibcloudError(msg, driver=self)
    return self._get_updated_balancer(balancer)
