Configure Defra domains on transition app 

In preparation of the transition of Defra detailed guides and move to partial transition strategy, several domains were discovered. This configures them to serve 410 or appropriate redirects, depending on the content of the site.

1. Stubbed org - http://ahvla.defra.gov.uk - currently stubbed, but the domain should point to the home page of the organisation
2. Pending transition, secondary domain that repoints to detailed guide - http://vla.defra.gov.uk 
3. Clean up the remainder - general 410 as they are formerly-live sites that still exist.