STOMP Chat sample is out of date

[artembilan]

There is an old reactor.tuple.Tuple usage in the XML config.

1. The Reactor isn't required dependency for SI since 4.2 (at least until 5.0)
2. In the Reactor 2.0.x the Tuple has been moved to the new reactor.fn.tuple package.

http://stackoverflow.com/questions/40643008/stomp-chat-web-socket-with-embedded-tomcat-reactor-error-type-reactor-tuple-tu