HPCC-10436 Timings missing from roxie queries

Fix core in previous release, and fix missing reset

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #5155 from richardkchapman/roxie-wu-timings

HPCC-10436 Timings missing from roxie queries

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>