kiji-bento: BENTO-58. Autodetect whether Hadoop is already configered, and only apply bento cluster if it's not

commit: https://github.com/kijiproject/kiji-bento/commit/1aa43d15e2c2981ce13f2dcf43570d08485c6d45
kiji-bento: Code review comments

commit: https://github.com/kijiproject/kiji-bento/commit/6caad15a91ff3c87cc59875066c347a87b367657
kiji-bento: Update to use latest schema-shell dependency

commit: https://github.com/kijiproject/kiji-bento/commit/9673a4452855d7a3c9867bddd5da5ef5e7c99d3d