Fix potential security risk when using Spring OXM

Disable by default external entity resolution when using Spring OXM
with jaxb. This prevents a XML entity from being able to resolve a
local file on the host system.

See:
https://www.owasp.org/index.php/XML_External_Entity_(XXE)_Processing

Issue: SPR-10806

Author: Arjen Poutsma

spring-web/src/main/java/org/springframework/http/converter/xml/Jaxb2CollectionHttpMessageConverter.java

@@ -226,7 +226,9 @@ protected void writeToResult(T t, HttpHeaders headers, Result result) throws IOE
 	 * @return the created factory
 	 */
 	protected XMLInputFactory createXmlInputFactory() {
-		return XMLInputFactory.newInstance();
+		XMLInputFactory inputFactory = XMLInputFactory.newInstance();
+		inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, false);
+		return inputFactory;
 	}
 
 }