Adding support for Kerberos credential delegation

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1616157 13f79535-47bb-0310-9956-ffa450edef68
Removing some tabs

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1616168 13f79535-47bb-0310-9956-ffa450edef68