Add setup method to AuthenticationStrategy by analogy with service setup. More convenient alternative to setAuthentication/setApplication/setName and removes the need for getters, since it ensures that all services are already registered by the time of a call.

For example, right now every time you get entityService in a strategy you call:

1. AuthenticationBaseStrategy.configuration
2. AuthenticationBase.configuration
3. Object.assign and app.get
4. app.service

All of those calls can be done once in setup method instead doing them every time.

Also fixed small inconsistencies in app.setup:

1. Moved this line up since otherwise a service registered in other service setup call will not get setup call.

2. Moved those lines down so that setup call for a dynamically registered service happens after the service is registered just like for a usual service.