Fix STS JDBC to work with Oracle, Add SAML_BINDING constant to be used to save the request method of the first saml request to the IDP

See https://github.com/picketlink/picketlink-bindings/pull/45


Add constructor to IDPWebRequestUtil that uses the retreived SAML_BINDING and if not available the request.getMethod() to determine is the saml request was a bind or a post.