Since we worked mainly on the ramdisk image, the test-image was almost
empty and lacking the minimum components.
This components are now defined in a packagegroup which is included in
all nwl-images.
It also include a new MACHINE_FEATURE : nrsw-ready.
This feature allows us to not include NRSW modules for devices that are
not supported by NRSW: for the moment it is mainly the devices supported
by core-os like cn9130-cf-pro. These devices are build against there
custom kernel against which the NRSW modules are not buildable.
id:458169
The serie of COREOS_IMAGE_GENERATE_ variable are now better
handled by coreos and their default value depends on
DISTRO_FEATURES or COMBINED_FEATURES. We don't need to disable
them manually anymore.