HPCC-12401 Rename paramters so they don't clash with reserved words

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #6560 from ghalliday/issue12401

HPCC-12401 Rename paramters so they don't clash with reserved words

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>