Elasticsearch.service file issue during upgrade to 6.1

@tatdat I plan to go thorough all the *.rmpnew files created by upgrade/install process. I will ideally like these files to be in sync content wise corresponding to the release. *.rpmsave is ok as it is copy of old settings but *.rpmnew is something I have to account for.

/usr/lib/systemd/system/elasticsearch.service.rpmnew
/etc/elasticsearch/elasticsearch.yml.rpmnew
/etc/logstash/logstash.yml.rpmnew
/etc/kibana/kibana.yml.rpmnew