[#371] Support recent changes in NeoFS API protocol

Support:
  * new status codes (object, container, session);
  * object `Lock` message;
  * different signature schemes.

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

object/status_test.go

@@ -0,0 +1,34 @@
+package object_test
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/object"
+	"github.com/nspcc-dev/neofs-api-go/v2/status"
+	statustest "github.com/nspcc-dev/neofs-api-go/v2/status/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestStatusCodes(t *testing.T) {
+	statustest.TestCodes(t, object.LocalizeFailStatus, object.GlobalizeFail,
+		object.StatusAccessDenied, 2048,
+		object.StatusNotFound, 2049,
+		object.StatusLocked, 2050,
+		object.StatusLockNonRegularObject, 2051,
+		object.StatusAlreadyRemoved, 2052,
+	)
+}
+
+func TestAccessDeniedDesc(t *testing.T) {
+	var st status.Status
+
+	require.Empty(t, object.ReadAccessDeniedDesc(st))
+
+	const desc = "some description"
+
+	object.WriteAccessDeniedDesc(&st, desc)
+	require.Equal(t, desc, object.ReadAccessDeniedDesc(st))
+
+	object.WriteAccessDeniedDesc(&st, desc+"1")
+	require.Equal(t, desc+"1", object.ReadAccessDeniedDesc(st))
+}