It's simpler to have fewer of these, and it's clearer from callsites if it's
always explicit exactly which domain is being created.
I also removed two irregularities: domain_create.xml included hostnames but
domain_create_wildcard.xml did not, and the former called the domain name
%DOMAIN% whereas the latter called it %HOSTNAME%.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=204956433
Daggerizes all of the EPP flows. This does not change anything yet
about the flows themselves, just how they are invoked, but after
this CL it's safe to @Inject things into flow classes.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=125382478
