Update to current version of freemarker 2.3.17 -> 2.3.23
Update to current version of freemarker 2.3.17 -> 2.3.23

jpkrohling/hawkular-alerts,hawkular/hawkular-alerts,hawkular/hawkular-alerts,lucasponce/hawkular-alerts,lucasponce/hawkular-alerts,jpkrohling/hawkular-alerts,hawkular/hawkular-alerts,hawkular/hawkular-alerts,lucasponce/hawkular-alerts,lucasponce/hawkular-alerts