API v2 - specify API version via headers or in url
API v2 - switching two /blah/ regexs to %r{blah}
attempting to fix busted test:
Katello::Api::V1::UsersControllerTest.test_list_owners_username
changing :apiv to :api_version
API v2 - actually let's just extend foreman's constraints since they're
the same
fixing tests that check for api routes