[TASK] Execute functional tests and lint in parallel

Change-Id: Icab8cd1d7f4b9a56f10ed7fc1f6e945ff50b295c
Reviewed-on: https://review.typo3.org/27529
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel