Change vDC IP ranges to /16s
Change vDC IP ranges to /16s

When these were moved to be parameters in 6e2d8710d5aed2f5fc5b2ce57565d95d87fc768c
they were accidentally changed to /24s.

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