
Currently, if internal TLS communication is enabled, Kibana to Elasticsearch communication is unverified. This is because we set elasticsearch.ssl.verificationMode to 'none' by default (via kibana_elasticsearch_ssl_verify). This is poor a security posture. This change changes the default value of 'kibana_elasticsearch_ssl_verify' to 'true'. Change-Id: Ie4fa8e3a60d69cf5c4bdd975030c92be8113ffb1 Closes-Bug: #1885110