Added a streaming STS Token Validator + a bunch of STS tests

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1547791 13f79535-47bb-0310-9956-ffa450edef68
Downgrading test log

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1547792 13f79535-47bb-0310-9956-ffa450edef68