This patch fixes the following assert on shutdown:
"Shutting down while process /testenv/bin/python is running\"\n".
Change-Id: I4c32ead5e4952b69ffc6037739fd417a632eda1a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: David Schulz <david.schulz@qt.io>