HPCC-9328 - fix misue of a queryProp, should be getPropBool

Signed-off-by: Jake Smith <jake.smith@lexisnexis.com>
Merge pull request #4377 from jakesmith/hpcc-9328

HPCC-9328 - fix misue of a queryProp, should be getPropBool

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>