rework metadata

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

util/reflect/reflect.go

@@ -532,6 +532,9 @@ func Equal(src interface{}, dst interface{}, excptFields ...string) bool {
 			}
 			s := srcVal.MapIndex(key)
 			d := dstVal.MapIndex(key)
+			if !s.IsValid() || !d.IsValid() {
+				return false
+			}
 			if !Equal(s.Interface(), d.Interface(), excptFields...) {
 				return false
 			}

util/time/duration_test.go

@@ -35,7 +35,7 @@ func TestUnmarshalJSON(t *testing.T) {
 	err = json.Unmarshal([]byte(`{"ttl":"1y"}`), v)
 	if err != nil {
 		t.Fatal(err)
-	} else if v.TTL != 31536000000000000 {
+	} else if v.TTL != 31622400000000000 {
 		t.Fatalf("invalid duration %v != 31536000000000000", v.TTL)
 	}
 }
@@ -55,7 +55,7 @@ func TestParseDuration(t *testing.T) {
 	if err != nil {
 		t.Fatalf("ParseDuration error: %v", err)
 	}
-	if td.String() != "8760h0m0s" {
+	if td.String() != "8784h0m0s" {
 		t.Fatalf("ParseDuration 1y != 8760h0m0s : %s", td.String())
 	}
 }