No way to reset mini

I starting updating the phrasecount example to use beta snapshot. I wanted to utilize the new feature in beta where mini can automatically start a mini accumulo. The existing phrasecount IT would start mini accumulo before all test and start mini fluo before each test method. There was no way to use the new feature (auto start mini accumulo) w/o restarting everything before each test method.

Could possibly add a `reset(FluoConfig config)` method to mini. This would stop workers&oracle, reinit ZK and Accumulo, and then start workers&oracle.