Enable destroying of the old staging environment
Enable destroying of the old staging environment

We are moving away from having multiple staging environments (one per
region that we have a production environment). This is for cost saving
reasons.

This change allows us to run the `destroy-cloudfoundry` for the staging
environment in Ireland. This will leave the only staging environment in
London.

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf