Use expires_in instead of CacheControlConfiguration
Use expires_in instead of CacheControlConfiguration

Removing this custom use of the `cache_control` method will allow us to
simplify it and ultimately remove the `CacheControlConfiguration` class.

I think there's probably a bit of an open question about how sensible
it is to cache the redirect for a minute.

alphagov/asset-manager,alphagov/asset-manager,alphagov/asset-manager