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'
ACCUMULO-3146 Try to stabilize BalanceAfterCommsFailureIT and SimpleBalancerFairnessIT
Merge branch '1.6.1-SNAPSHOT'