config: fix tests

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

config/reflect_test.go

@@ -18,7 +18,7 @@ type SubConfig struct {
 
 func TestReflect(t *testing.T) {
 	cfg1 := &Config{Value: "cfg1", Config: &Config{Value: "cfg1_1"}, SubConfig: &SubConfig{Value: "cfg1"}}
-	cfg2, err := config.Clone(cfg1)
+	cfg2, err := config.Zero(cfg1)
 	if err != nil {
 		t.Fatal(err)
 	}