be6a493 openqa/worker: revert br0 netmask

Authored and Committed by adamwill 4 years ago
    openqa/worker: revert br0 netmask
    
    os-autoinst *really really* wants it to be this. The helper
    service fails if it isn't.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>