This moves Elasticsearch and Kibana to use the latest version
(6.2.2), as the images we were using are no longer supported with
the 6.x release. There was a change in the doc reference in the
log entries that prevented the previous ES version from indexing
those entries, resulting in a busted gate. Moving Kibana to 6.2.2
was required to match major/minor versions with Elasticsearch
The Elasticsearch version change also required changing config file
locations, changing the entrypoint used for launching the service,
changing the running user for the elasticsearch service, and
updated the ES tests as some of the API responses changed between
versions
This also required updating the elasticsearch template job as the
mapping definition entries changed between versions
Change-Id: Ia4cd9a66851754a1bb8f225c7e24513c43568e93
d681396412