Update NAT example for VPP 19.04. (#1328)
Update NAT example for VPP 19.04. (#1328)

Signed-off-by: Milan Lenco <fd44239370131ad5b8cae55d5f197286407fee30@pantheon.tech>
VladoLavor/vpp-agent,VladoLavor/vpp-agent,ondrej-fabry/vpp-agent,ondrej-fabry/vpp-agent,ondrej-fabry/vpp-agent,VladoLavor/vpp-agent