the new xmlsec version does extra validation that is causing SEVERE log warnings with the document optimizations when using the sun SAAJ impl.   Update the optimizations a bit to account for that.

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/branches/1_6_x-fixes@1458975 13f79535-47bb-0310-9956-ffa450edef68