SCHEMA-133. Fix API uses of KijiDataRequest

Use new KijiDataRequest builder API instead of rc3 KijiDataRequest API.

Signed-off-by: Christophe Taton <taton@wibidata.com>
SCHEMA-155. Merged KijiAdmin into Kiji.

Signed-off-by: Daisy Zhou <daisy@wibidata.com>