Merge attribute handling from request and response to commen code.

packages/ipp/textWithoutLanguage.go

@@ -14,9 +14,14 @@ func NewtextWithoutLanguage(name, value string) *textWithoutLanguage {
 	return c
 }
 
+func (c textWithoutLanguage) Name() string {
+	return c.name
+}
+
 func (c textWithoutLanguage) String() string {
 	return c.name + ":" + c.value
 }
+
 func (c *textWithoutLanguage) valueTag() tag {
 	return textWithoutLanguageValueTag
 }