Upgrade elasticsearch-rest-client to 6.5.1

According to the release notes [1], there are no REST client related
bug fixes in this release. This is just to keep up to date with the
latest version.

Also update ElasticContainer to use version 6.5.1.

[1] https://www.elastic.co/guide/en/elasticsearch/reference/current/release-notes-6.5.1.html

Change-Id: I04a6c545b8d2e3394e1d02431394d4861244ed30
1 file changed
tree: 06b6c4b3bb817e18caa61b4e8eef618e30b80e93
  1. gerrit-acceptance-tests/
  2. gerrit-elasticsearch/
  3. gerrit-pgm/