Patch ActionController::Parameters#reverse_merge

Calling #reverse_merge on an ActionController::Parameters object builds
a new object which doesn't have the same value for the permitted
instance variable. This monkey patches #reverse_merge to set the value
of permitted to match the original, on the basis that if you're
reverse_merging into an already permitted hash you are probably happy
with the new keys
Add strong params for attachments
Add strong params for access and opening times
Add strong params for contact translations
Add strong params for contacts
Add strong params for corp info pages