[WSS-420] - Add the ability to explicitly allow/disallow UsernameTokens with no passwords


Conflicts:
	ws-security-dom/src/test/java/org/apache/ws/security/dom/message/UTDerivedKeyTest.java

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1442079 13f79535-47bb-0310-9956-ffa450edef68