Parquet files don't have ignore and row id columns

[sebffischer]

So it seems to, that the parquet files are missing the is_row_identifier and is_ignore columns, at least for the two examples provided below.

• For the ignore column compare dataset 210
• For the row identifier compare dataset 8

[joaquinvanschoren]

Those should be in the dataset meta-data, not in the parquet file itself (they are also not in the ARFF file).