created (failing) integration test checking consistency of 3 instances

Test is very simple and crude...
* we start 3 services on ports 10001,10002, and 10003 each managing a
 simple counter
* we wait for leader to settle then loop commiting a single byte message
* we expect all instances to have same value for counter
removing dependency on JDK 7 features
Merge pull request #53 from foldlabs/more-testing

created (failing) integration test checking consistency of 3 instances