### Description of Changes
this fixes a null pointer exception
Issue: https://coreosdev.atlassian.net/browse/QUAY-fix_bug_superuser_panel
## Reviewer Checklist
- [ ] It works!
- [ ] Comments provide sufficient explanations for the next contributor
- [ ] Tests cover changes and corner cases
- [ ] Follows Quay syntax patterns and format
this moves all the db model code behind an interface in prep for v2-2
Issue: https://coreosdev.atlassian.net/browse/QUAY-750
- [ ] It works!
- [ ] Comments provide sufficient explanations for the next contributor
- [ ] Tests cover changes and corner cases
- [ ] Follows Quay syntax patterns and format