Update elasticsearch-rest-client to 6.3.1

Also update the test container to use version 6.3.1.

Change-Id: I78d24ba8ba1a8612276a78ab3549b37cd53708d2
1 file changed
tree: 54641198f533a01d763664277e8a8bda01d04b20
  1. gerrit-acceptance-tests/
  2. gerrit-elasticsearch/
  3. gerrit-pgm/