Improve Ident validation, extract Ident from Contact

#569

app/controllers/registrar/contacts_controller.rb

@@ -2,6 +2,7 @@ class Registrar
   class ContactsController < DeppController
     before_action :init_epp_contact
     helper_method :address_processing?
+    helper_method :ident_types
 
     def index
       authorize! :view, Depp::Contact
@@ -140,5 +141,9 @@ class Registrar
     def address_processing?
       Contact.address_processing?
     end
+
+    def ident_types
+      Contact::Ident.types
+    end
   end
 end