xml 생성 설정 수정

src/main/java/cokr/xit/foundation/data/XML.java

@@ -24,6 +24,7 @@ public class XML extends AbstractComponent {
 		if (xmlMapper == null) {
 			xmlMapper = new XmlMapper();
 			xmlMapper.configure(ToXmlGenerator.Feature.WRITE_XML_DECLARATION, true);
+			xmlMapper.configure(ToXmlGenerator.Feature.WRITE_XML_1_1, true);
 		}
 		return xmlMapper;
 	}