[WSS-434] - Add ValueType attribute to a Signature/Encryption Reference to a DerivedKeyToken


Conflicts:
	ws-security-dom/src/main/java/org/apache/wss4j/dom/message/WSSecDKEncrypt.java
	ws-security-dom/src/main/java/org/apache/wss4j/dom/message/WSSecDKSign.java

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1468902 13f79535-47bb-0310-9956-ffa450edef68