Explore alternate injection method for akka-http

[reibitto]

akka-http's DSL makes it difficult (or impossible?) to inject the VCR client in a transparent way. For context, see the discussion here.

Ideally a user would not be forced to restructure their code to use be-kind-rewind. You just code to the interface and then you swap out the implementation with the VcrClient. akka-http doesn't have this concept though, so we may have to be creative here.

Like I said, this might not even be feasible. I can't see any obvious solutions. But I'd like to at least explore the options before saying it's impossible. Maybe there's something clever that can be done at the actor-level? I don't know, but ideas would be welcome here.