Add new Elasticsearch data disk
Add new Elasticsearch data disk

We've run out of disk space on /mnt/elasticsearch on the
logs-elasticsearch-{2,3} machines, so add a new physical
volume to the existing LVM mount on all three logs-elasticsearch machines
for consistency purposes.

The new disk is 256gb.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet