iotests: Fix timeout in run_job()

iotests: Fix timeout in run_job()

run_job() accepts a wait parameter for a timeout, but it doesn't
actually use it. The only thing that is missing is passing it to
events_wait(), so do that now.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>