fix Token renewal (#2990)

Author: romanett

Stack/Opc.Ua.Core/Stack/Tcp/TcpServerChannel.cs

@@ -682,7 +682,14 @@ private bool ProcessOpenSecureChannelRequest(uint messageType, ArraySegment<byte
                 State = TcpChannelState.Open;
 
                 // send the response.
-                SendOpenSecureChannelResponse(requestId, CurrentToken, request);
+                if (requestType == SecurityTokenRequestType.Renew)
+                {
+                    SendOpenSecureChannelResponse(requestId, RenewedToken, request);
+                }
+                else
+                {
+                    SendOpenSecureChannelResponse(requestId, CurrentToken, request);
+                }
 
                 // notify reverse 
                 CompleteReverseHello(null);

Stack/Opc.Ua.Core/Stack/Tcp/UaSCBinaryChannel.Symmetric.cs

@@ -72,7 +72,6 @@ protected void ActivateToken(ChannelToken token)
             Utils.SilentDispose(m_previousToken);
             m_previousToken = m_currentToken;
             m_currentToken = token;
-            Utils.SilentDispose(m_renewedToken);
             m_renewedToken = null;
 
             OnTokenActivated?.Invoke(token, m_previousToken);