updating dependencies for wso2-wss4j-1.5.11-wso2v7
updating wss4j version
Changing wss4j version to released version 1.5.11.wso2v7
Merge pull request #2 from Nipuni/master

updating dependencies for wso2-wss4j-1.5.11-wso2v7
Merge pull request #3 from jeewamp/master

Changing wss4j version to released version 1.5.11.wso2v7
Merge pull request #2 from wso2-dev/master

wss4j version change