updating logstash version to avoid issue with permissions. https://github.com/elastic/logstash/issues/3249#event-315149287
updating logstash version to avoid issue with permissions. https://github.com/elastic/logstash/issues/3249#event-315149287

Hewlett-Packard-ESS/docker-logstash,Hewlett-Packard-ESS/docker-logstash,Hewlett-Packard-ESS/docker-logstash