ACCUMULO-3078 ACCUMULO-3138 Remove the getStaticCluster reference again

The AccumuloConfiguration from the Instance is at least the
ClientConfiguration. We can use that to remove the reliance
on needing the shared MiniAccumuloCluster.
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-3144 Give the servers some time to flush out their buffers to the MAC log pipe.
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-3145 Fix loop invariants in listscans

Added some extra logging and (automatically) fixed formatting.
Merge branch '1.6.1-SNAPSHOT'