Added node.local setting to elasticsearch config template

We found that setting "discovery.zen.ping.multicast.enabled: false" was not enough to prevent elasticsearch from discovering other nodes in the same LAN. Setting "node.local: true" resolved the problem.

See here:
http://elasticsearch-users.115913.n3.nabble.com/How-to-isolate-elastic-search-node-from-other-nodes-td3977389.html