HPCC-11035 Add new fields to SprayFixed and SprayVariable

Added support for "failIfNoSourceFile" and "recordStructurePresent".

Fixes HPCC-11035

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5680 from GordonSmith/HPCC-11035

HPCC-11035 Add new fields to SprayFixed and SprayVariable

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>