T277552 project jdata store as parquet
Created by: gmodena
Project instanceof metadata in the model output.
This PR adds change to export metadata related to the "instance of"
property of a q item. This information stored as an appended to column to the model output,
and propagates to HDFS and Hive imagerec datasets.
This PR also adds a spark job to upload and convert model output to Parquet. This has
been done to facilitate interop with spark, and handle schema migrations.