Look back through Terrafrom mappings

[dylanratcliffe]

After #639 has been merged, we will be able to specify different methods for different terraform mappings. It would be a good idea to go over all of the adapters and find out if there are other ways we could be mapping them. For example it's very common for a resource in Terraform to have an ARN and an ID, and for these to require different methods. By adding both of these we significantly improve the changes that mappings will work