Reject RSA v1.5 KeyTransport by default in the DOM code, and make this configurable.
 - Also make it configurable in WSSSecurityProperties in the StaX layer.

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1468041 13f79535-47bb-0310-9956-ffa450edef68