RANGER-5477: Fix TransformerFactory incompatibility causing plugin installation failures (#842)

Author: bhaveshamre

agents-installer/src/main/java/org/apache/ranger/utils/install/XmlConfigChanger.java

@@ -283,9 +283,8 @@ public void run() throws ParserConfigurationException, SAXException, IOException
 
             TransformerFactory tfactory = TransformerFactory.newInstance();
 
-            tfactory.setFeature("http://xml.org/sax/features/external-general-entities", false);
-            tfactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
-            tfactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
+            tfactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
+            tfactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, "");
             tfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
 
             Transformer transformer = tfactory.newTransformer();