Disable usage collection in Kibana

This commit disables collection of usage data in Kibana by default.
User has still an option to enable it via GUI. Reference: [1]

[1] https://www.elastic.co/guide/en/kibana/7.x/telemetry-settings-kbn.html

Change-Id: Ic3a8bf05a73fb042ae42cbd26ccced60240d8e94