kiji-mapreduce: Update to use the latest SNAPSHOT version of kiji-schema

commit: https://github.com/kijiproject/kiji-mapreduce/commit/f9fe0b7df91640526d9e4380928c10bac81ee0a2
kiji-mapreduce-lib: Update to use the latest SNAPSHOT version of kiji-schema

commit: https://github.com/kijiproject/kiji-mapreduce-lib/commit/1aff39cea8d55fcf52d1703bd09e1a570f5ca633