Resolve "Fix eco2 p2p unknown peers"

Closes #128

Add --listen-port 31303 --discv4-port 31303 to eco2

./truite2 --chain-spec-file clermont-bootnode.ron --no-dns-discovery --cidr 192.168.0.0/16 --rpc-listen-address 0.0.0.0:8545 --listen-port 31303 --discv4-port 31303