HPCC-9381 Roxie file resolution tracing

Make tracing dependant on traceLevel

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4414 from richardkchapman/roxie-file-tracing

HPCC-9381 Roxie file resolution tracing

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>