Update Kiji MapReduce lib to rc4 to correspond with the rest of Kiji

Signed-off-by: Robert Chu <robert@wibidata.com>
SCHEMA-133. Update to new KijiDataRequest API

Signed-off-by: Christophe Taton <taton@wibidata.com>
KIJIMR-19. Update builders with new .withConf(Configuration)

Signed-off-by: Lee Sheng <lsheng@wibidata.com>
KIJI-419-MRLIB. Removed KijiConfiguration.
KIJI-419-MRLIB. small fixes.