[#47792685] alert for high write connections on NGINX frontend
[#47792685] alert for high write connections on NGINX frontend

Second time around, avoiding the bug in nagios::check::graphite

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