project.py: Allow 'host-arches' and 'arches' in project.conf
This fixes a regression from 6691d0eb7e20c5872d7a5f439f308ae46019777f.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This fixes a regression from 6691d0eb7e20c5872d7a5f439f308ae46019777f.