kiji-scoring-server: SCORSRVR-22. Update REVIEWERS file.

issue: https://jira.kiji.org/browse/SCORSRVR-22
review: https://review.kiji.org/r/1826
commit: https://github.com/kijiproject/kiji-scoring-server/commit/7895b3d72a05e9da6479b6bb37dcdde32ccb9610