allows to configure whether the ORC exporter does put all related ORCPartially reverting 5a8a8a7847f6a179eeb5f47521602d4977c1e482.
files in a single directory (named after the master table) or not.
Default is to put each ORC files in dedicated directories (i.
This is needed to ensure better compliance with usual ORC semantics,
where one directory = one table.
``group_tables=False`` by default).
This revert the default behavior of the ORC exporter to the one before
5a8a8a7847f6a179eeb5f47521602d4977c1e482