kiji-schema: SCHEMA-894. kiji install should fail on extra CLI arguments.

 - Adds a precondition.

issue: https://jira.kiji.org/browse/SCHEMA-894
review: https://review.kiji.org/r/2088
commit: https://github.com/kijiproject/kiji-schema/commit/b7ae796e85c68baf165feebec667f62919771fa6