kiji-scoring-server: SCORSRVR-31. Update to account for CounterManager

issue: https://jira.kiji.org/browse/SCORSRVR-31
review: https://review.kiji.org/r/2070
commit: https://github.com/kijiproject/kiji-scoring-server/commit/4a3d9289fc4b396286eed87ee0d305beadeb5911