Example dynamic MBean in the test web application

I added a dynamic MBean that exposes all of the JVM's system properties.  I also added some FitNesse tests to make sure that it works as expected.  I'm working towards building a test environment in which we can demonstrate the end-to-end extract/load functionality.

Along the way, I realized that the Guice stuff wasn't really buying us much and it will make it harder for the FitNesse fixtures to access remote MBeans (that's coming next), so I took the Guice stuff out.

As I write this, I remembered that Tesca (I think) was looking into dynamic beans also.  I'm not sure what the intended output of that work is, so I apologize if this duplicates some effort.  Tesca, if these changes interfere with your work, they don't have to pulled into the repo.