HPCC-10270 SprayVariable has incorrect parameters

Fixes HPCC-10270

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5054 from GordonSmith/HPCC-10270

HPCC-10270 SprayVariable has incorrect parameters

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>