Turn on fuelmenu by default, turn off biosdevname

Turn on fuelmenu by default, turn off biosdevname

Added experimental Fuel build loop, rebuilding up to ten times
while keeping the package cache, in the hope that all packages
will be able to download. Added snapshot support into this script
as well.

Changed naming of OPNFV iso label to OPNFV_FUEL_<id>, made changes
in ks.cfg and isolinux.cfg to look for this name at install.

Change-Id: Ic28a3af769cfc90416d7d988afd6f07eadcef4f1
Signed-off-by: Stefan K. Berg <stefan.k.berg@ericsson.com>