HPCC-11914 VIRTUAL(filename) not supported on Roxie

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #6239 from richardkchapman/roxie-querylogicalfilename

HPCC-11914 VIRTUAL(filename) not supported on Roxie

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>