Cluster connection timeout is ignored

It seems like the connection timeout setting of a cluster is not used.

However, in the 7.x-5.x version of this module:

$options = array(
  'hosts' => array($cluster->url),
  'curl' => array(
    CURLOPT_IPRESOLVE => CURL_IPRESOLVE_V4,
    CURLOPT_CONNECTTIMEOUT => (!empty($cluster->options['timeout']) ? $cluster->options['timeout'] : ELASTICSEARCH_CONNECTOR_DEFAULT_TIMEOUT)
  )
);