Accumulo Mini Cluster for local integration testing

There is no 1.4 branch for this... mini cluster doesn't exist in 1.4.

The mini cluster is a new module, but is not added to the parent pom so that it doesn't get built automatically.
Probably not... I think the original idea was you could stop and re-initialize an instance. But it would be easier just to create a new one, so your suggestion makes sense.