add national to bulk upload

app/services/bulk_upload/lettings/row_parser.rb

@@ -252,6 +252,7 @@ private
 
       ethnic_group: %i[field_43],
       ethnic: %i[field_43],
+      national: %i[field_44],
     }
   end
 
@@ -345,6 +346,7 @@ private
 
     attributes["ethnic_group"] = ethnic_group_from_ethnic
     attributes["ethnic"] = field_43
+    attributes["national"] = field_44
 
     attributes
   end

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -82,6 +82,7 @@ RSpec.describe BulkUpload::Lettings::RowParser do
             field_20: "F",
 
             field_43: "17",
+            field_44: "18",
           }
         end