HPCC-8923 Roxie not checking workunit version matches

Should not try to load workunits that are not an appropriate version.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4061 from richardkchapman/roxie-version-check

HPCC-8923 Roxie not checking workunit version matches

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>