[#149] sdk/netmap: Add net address getter to Node

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/netmap/node_info_test.go

@@ -0,0 +1,21 @@
+package netmap
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNode_NetworkAddress(t *testing.T) {
+	addr := "127.0.0.1:8080"
+
+	nV2 := new(netmap.NodeInfo)
+	nV2.SetAddress(addr)
+
+	n := Node{
+		InfoV2: nV2,
+	}
+
+	require.Equal(t, addr, n.NetworkAddress())
+}