Fix koanf networkdelay pubKey (#835)

plugins/networkdelay/plugin.go

@@ -16,6 +16,7 @@ import (
 	"github.com/iotaledger/hive.go/logger"
 	"github.com/iotaledger/hive.go/node"
 	"github.com/mr-tron/base58"
+	flag "github.com/spf13/pflag"
 )
 
 const (
@@ -46,6 +47,10 @@ var (
 	clockEnabled bool
 )
 
+func init() {
+	flag.String(CfgNetworkDelayOriginPublicKey, "9DB3j9cWYSuEEtkvanrzqkzCQMdH1FGv3TawJdVbDxkd", "default issuer node public key")
+}
+
 // App gets the plugin instance.
 func App() *node.Plugin {
 	once.Do(func() {