NoMessageLost Test.

Heya Jeanfrancois

I have a test that exercises the ```org.atmosphere.cache.UUIDBroadcasterCache``` and connects with wasync over Long-Polling. For some reason currently this test fails and I have no idea why, might be an issue in the test, but I think extending the test suite with a test like this makes sense anyhow (and also serves as a nice illustration on how to configure everything for not missing any messages).

Cheers, Christian.