Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=56573
Change the value returned by Session.getRequestURI() from the value obtained from HttpServletRequest.getRequestURI() to the value obtained from HttpServletRequest.getRequestURI() with the scheme changed to ws or wss as appropriate. Note that the WebSocket Expert Group is expected to clarify the expected behaviour for Session.getRequestURI() which may result in further changes.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1600651 13f79535-47bb-0310-9956-ffa450edef68