This does not change existing functionality but will allow us to use this common code in the yet-to-be-created web console action as well.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=227159346
This is in preparation for having a web-console endpoint to create OTE.
In addition - we streamline the code:
- we remove support for different premium lists
- we remove support for different DNS writers - we never want a "real" DnsWriter for OTE
- we remove support of --eap_only, because we don't need it anymore
- We use a single password for all the Registrars
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=225841694