kiji-schema: BENTO-60. Update upgrade client to be usable for Wibi Enterprise.

issue: https://jira.kiji.org/browse/BENTO-60
review: https://review.kiji.org/r/1344
commit: https://github.com/kijiproject/kiji-schema/commit/64e57ac4b592644f427f33414546ba1c3e3f81de
kiji-bento: BENTO-60. Update upgrade client to be usable for Wibi Enterprise.

issue: https://jira.kiji.org/browse/BENTO-60
review: https://review.kiji.org/r/1346
commit: https://github.com/kijiproject/kiji-bento/commit/24398118de83f17a3d470e08c839e6ffbbf0410d