ACCUMULO-378 Comments and better toString
ACCUMULO-378 Rogue test class not in the right package.
ACCUMULO-2819 Introduce closedTime and an OrderSection to the replication table.

Need to have global ordering for WALs used by a table. Using this, we can make guarantees
about what data is safe to replicate concurrently, and what data must wait to be replicated.
ACCUMULO-378 Only set the Replication table combiner on the status and work columns (unnecessary for order columns)
ACCUMULO-2819 Make sure that order records are deleted with the status and work records.

Tests for both the removal and the (de)serialization of the Order records.