kiji-hive-adapter: KIJIHIVE-43. Fixed an issue where data requests were not being properly serialized when multiple tables were used in one query(joins).

Signed-off-by: Daisy Zhou <daisy@wibidata.com>
commit: https://github.com/kijiproject/kiji-hive-adapter/commit/be5c7140260e6f6d2e1c6ef28be68117c718fe1e