Fuel patch to enable virtual deployment

Disable ext4 journalling during Fuel master image creation,
otherwise the provisioning process times out on many virtual
setups after 3600 sec.

All credit to Michal Skalski of Mirantis for providing the
information to patch this up:

https://docs.mirantis.com/openstack/fuel/fuel-6.1/release-notes.html#issues-with-image-based-provisioning
https://review.openstack.org/#/c/197943/

Change-Id: I90f68a351b3afe1273440846bc5d56da8f6d3507
Signed-off-by: Stefan K. Berg <stefan.k.berg@ericsson.com>