Added support for DOM Encryption Derived + tests

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1567068 13f79535-47bb-0310-9956-ffa450edef68
Added more derived interop tests

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1567069 13f79535-47bb-0310-9956-ffa450edef68