Add schema translation from Avro to Hive columns

The Parquet InputFormat that works with both Hive and Impala, parquet.hive.DeprecatedParquetInputFormat, doesn't understand avro schemas. There is code in parquet-hive to translate from Hive's column descriptions to a Parquet MessageType. To get the table schema to Hive and Impala, we need to translate from an avro schema to Hive's FieldSchema and TypeInfo objects.