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.
Interesting point.  Also, I was wrong...  SFI's don't have size.  The to just 'featureStore.getFeatures(query)' is a FeatureCollection which does have a size.  

I tried to trace through it, and at the minute, the abstract GT implementations we leverage for an AccumuloFeatureCollection do exactly the same thing you are doing to get the count.  

I'd slightly advocate for the call to size since they already wrote the code once.  That said, GT could change under us, so I can appreciate the defensiveness of (re)writing our own count.