Fix apparently invalid auto-test (qmlwebsockets)

It makes sense to first start listening (server.listen = true) and then
connect (socket.active = true).

Task-number: QTBUG-59388
Change-Id: I4235dad87ee3a62ebf75cec39e5d9fa4b7ed7552
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

tests/auto/qml/qmlwebsockets/tst_qmlwebsockets.qml

@@ -52,8 +52,8 @@ Rectangle {
 
     TestCase {
         function ensureConnected() {
-            socket.active = true;
             server.listen = true;
+            socket.active = true;
             tryCompare(socket, 'status', WebSocket.Open);
             verify(server.currentSocket);
         }