kiji-schema: SCHEMA-562. KijiSecurityManager doesn't revoke permissions correctly.

issue: https://jira.kiji.org/browse/SCHEMA-562
review: https://review.kiji.org/r/1164
commit: https://github.com/kijiproject/kiji-schema/commit/1d5d78fde55eced6d1f707ed2df6ed30e2e74336