New images.json.sample file
to be copied/modified (without comment lines) as
/etc/fedora-openqa/images.json or ~/.config/fedora-openqa/images.json
if want to change from default WANTED dict in fedora_openqa/config.py
Better to tune this images.json at installation time
to manage list of supported arches.
This is a follow up of previous commits:
* 4d1b71a Add ppc64/ppc64le images support
* 9f19b1f Don't schedule PowerPC jobs by default, for now
Signed-off-by: Michel Normand <normand@linux.vnet.ibm.com>