Add all Self-Service second factor functionalities

Dep: https://github.com/SURFnet/Stepup-Middleware-clientbundle/pull/4

The identity ID is currently hard-coded to `45fb401a-22b6-4829-9495-08b9610c18d4`. This identity must be present in the middleware.

- [x] Translate translation keys
- [x] Change back to client@dev-develop
- [x] Text message originator is the same for all text messages, make configurable and pass into service.