kiji-express: EXP-348. Scalastyle fails on Macs

issue: https://jira.kiji.org/browse/EXP-348
review: https://review.kiji.org/r/1461
commit: https://github.com/kijiproject/kiji-express/commit/a0e747bd4a000344c55f117963925a3d2ced9db8