Complete Avro 1.12 upgrade

src/main/java/org/apache/ws/commons/schema/walker/FixedXmlSchemaWalker.java

@@ -452,8 +452,7 @@ private XmlSchemaElement getElement(XmlSchemaElement element, boolean isSubstitu
 
 		XmlSchema schema = schemasByNamespace.getSchemaDefiningElement(elemQName);
 		if (schema == null) {
-			// TODO: is this correct? The previous code used whichever schema was stored in the schemasByNamespace HashMap
-			// for the element's namespace.
+			// If not found, inherit schema from the elements parent
 			schema = element.getParent();
 		}