Refactor registrars

- Reorganize views
- Improve database structure
- Use default translations
- Combine tests

app/controllers/admin/registrars_controller.rb

@@ -58,12 +58,12 @@ module Admin
     def registrar_params
       params.require(:registrar).permit(:name,
                                         :reg_no,
-                                        :street,
-                                        :city,
-                                        :state,
-                                        :zip,
-                                        :country_code,
                                         :email,
+                                        :address_street,
+                                        :address_zip,
+                                        :address_city,
+                                        :address_state,
+                                        :address_country_code,
                                         :phone,
                                         :website,
                                         :code,