create-image: Override default filesystm with ROOT_FS
create-image: Override default filesystm with ROOT_FS

If you need a root filesystem in a different fs than ext4, then you can
use the ROOT_FS=<fs> in the .virt files.

ext4 remains the default.

enovance/edeploy,enovance/edeploy,redhat-cip/edeploy,redhat-cip/edeploy,enovance/edeploy,redhat-cip/edeploy,enovance/edeploy,redhat-cip/edeploy