WSS-449 - Receiving code can't handle the case of a Thumbprint reference to a BST in the token 
- The same applies to X509 Issuer serial references and therefore fixed too
- some cleanups


git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1491219 13f79535-47bb-0310-9956-ffa450edef68