kiji-scoring: SCORE-133. Reflect class name changes from EXP-298.

issue: https://jira.kiji.org/browse/SCORE-133
review: https://review.kiji.org/r/1378
commit: https://github.com/kijiproject/kiji-scoring/commit/4b032c5e41b4a65127dd9feb9c9a977cf0b0bdbb