Add class-specific migration data to hierarchy
Add class-specific migration data to hierarchy

This hieradata is going to be used to configure gor on the cache
machines differently depending on which provider the machine is
hosted with.

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