Use List.addAll() instead of iteration.

Resolves #1336.

Author: hduelme

spring-xml/src/main/java/org/springframework/xml/xsd/commons/CommonsXsdSchemaCollection.java

@@ -189,10 +189,7 @@ private void inlineIncludes(XmlSchema schema, Set<XmlSchema> processedIncludes,
 				if (!processedIncludes.contains(includedSchema)) {
 					inlineIncludes(includedSchema, processedIncludes, processedImports);
 					findImports(includedSchema, processedImports, processedIncludes);
-					List<XmlSchemaObject> includeItems = includedSchema.getItems();
-					for (XmlSchemaObject includedItem : includeItems) {
-						schemaItems.add(includedItem);
-					}
+					schemaItems.addAll(includedSchema.getItems());
 				}
 				// remove the <include/>
 				schemaItems.remove(i);