HPCC-10100 Change the default quote character for csv files

Update all relevant source.

Signed-off-by: Attila Vamos <attila.vamos@gmail.com>
Merge pull request #5934 from AttilaVamos/HPCC-10100-feature

HPCC-10100 Change the default quote character for csv files

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>