OrphanSponsorshipStatus replaces SponsorshipStatus

Part of PT https://www.pivotaltracker.com/story/show/78039462.
As per ERD V2, SponsorshipStatus dropped, OrphanSponsorshipStatus created, including attendant associations, test, seeds, factories.
We need `OrphanSponsorshipStatus.create(name: 'On Hold', code: 4)` as well