tweak blank error message for bulk upload (#1211)

app/services/bulk_upload/lettings/row_parser.rb

@@ -205,7 +205,7 @@ private
       next if log.optional_fields.include?(question.id)
       next if question.completed?(log)
 
-      fields.each { |field| errors.add(field, :blank) }
+      fields.each { |field| errors.add(field, I18n.t("validations.not_answered", question: question.check_answer_label&.downcase)) }
     end
   end
 

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -279,6 +279,10 @@ RSpec.describe BulkUpload::Lettings::RowParser do
         it "returns an error" do
           expect(parser.errors[:field_103]).to be_present
         end
+
+        it "populates with correct error message" do
+          expect(parser.errors[:field_103]).to eql(["You must answer type of building"])
+        end
       end
 
       context "when unpermitted values" do