Use 16 workers for tempest test for iscsi
Use 16 workers for tempest test for iscsi

Signed-off-by: Remus Buzatu <442ca000fc34b0239b9e438dbc108749457853bd@gmail.com>

cloudbase/cinder-ci,cloudbase/cinder-ci,rbuzatu90/cinder-ci,rbuzatu90/cinder-ci