Bug 32558: (QA follow-up) Leave default to 1, remove extra fork

Bug 32558: (QA follow-up) Leave default to 1, remove extra fork

The default of 1 resembles the old behavior: 1 fork for the job.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 3bf4addb2497704877a8caa0d3456afc9b1aa0c8)
Signed-off-by: Jacob O'Mara <jacob.omara@ptfs-europe.com>
(cherry picked from commit 13023b2fe867d621170b694ed61168072fc50202)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>