* Updated image for Elasticsearch 6 support, removed supervisord since k8s deployments provide that capability already, and added apiVersion to support helm upgrades
* added new dockerfile source repo to sources list for the Helm chart
* removed obsolete repo from helm Chart source list
* conditionally create the deployment only if elasticsearch host was provided; needed for PR merge bot
* conditionally create the deployment only if elasticsearch host was provided; needed for PR merge bot
* change maintainer format