test/bonding: assign non-zero MAC to null devices
test/bonding: assign non-zero MAC to null devices

Prevent failure in rte_eth_dev_default_mac_addr_set() that
results in bonding add slave failure.

Fixes: aa7791ba8de0 ("net/bonding: fix setting slave MAC addresses")

Signed-off-by: Radu Nicolau <fa459cf59d47c122ba776e9a6f631c862bf44680@intel.com>
Reviewed-by: Ferruh Yigit <ba8734c3c506d2e3557bd4ac8fdaccd25bdb9aa7@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk