tst_qnetworkreply: Use object.connect() to get rid of warning

warning C4573: the usage of 'tst_QNetworkReply::connect' requires the
compiler to capture 'this' but the current default capture mode does not
allow it

Change-Id: Ic9fd526fedf7c52e53e2b1136834c10bf4cd0ea9
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

tests/auto/network/access/qnetworkreply/tst_qnetworkreply.cpp

@@ -6426,7 +6426,8 @@ void tst_QNetworkReply::abortOnEncrypted()
         QSKIP("Server fails to listen. Skipping since QTcpServer is covered in another test.");
 
     server.connect(&server, &SslServer::newEncryptedConnection, [&server]() {
-            connect(server.socket, &QTcpSocket::readyRead, server.socket, []() {
+            // MSVC 201X C4573-misunderstands connect() or QObject::connect(), so use server.connect():
+            server.connect(server.socket, &QTcpSocket::readyRead, server.socket, []() {
                 // This slot must not be invoked!
                 QVERIFY(false);
             });