Consider banning primitive types from wiring candidates

[adamw]

Sometimes if you forget to add a dependency to autowire's parameters which needs manual creation you get errors such as a missing String dependency (if a String is needed to create said instance).

Maybe we should short-circuit even earlier, that is report an error any time someone tries to create an instance parametrised by any type from scala.*. Maybe the blacklist should also include java.lang.*, java.util.* and the like. What do you think?