Integration Tests

[Corey Nolet]

Would it make sense to start putting more integration tests for tablet servers, 
master, connector, etc… inside of the accumulo-test module (or some other 
module)? Seems like it'd be useful to have tests at the various layers. Until 
we have a plugin to start up the mini acc cluster once and only once, I don't 
want to drastically slow down the build. I would, however, like to have some 
integration tests for a current ticket I'm working on.