[CXF-4977] Record the security context with the SCT token to be able to restore it during the real invokations

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/wss4j2.0-port@1477984 13f79535-47bb-0310-9956-ffa450edef68
[CXF-4977] Update the test config so it gets the SAML token from the STS and sends that as part of the request to get the SecureConversationToken.   The service is failing to process that token (or something).

git-svn-id: https://svn.apache.org/repos/asf/cxf/branches/wss4j2.0-port@1477985 13f79535-47bb-0310-9956-ffa450edef68