Axivion: Ensure clean session start

Before accessing a dashboard server the first time remove
possibly existing session cookies from former requests to
other dashboard servers.

Fixes: QTCREATORBUG-31785
Change-Id: I2d08f1f121cdb56e1036d656748ebbcafb0643e7
Reviewed-by: Mohammad Mehdi Salem Naraghi <mehdi.salem@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/axivion/axivionplugin.cpp

@@ -39,6 +39,7 @@
 #include <QInputDialog>
 #include <QMessageBox>
 #include <QNetworkAccessManager>
+#include <QNetworkCookieJar>
 #include <QNetworkReply>
 #include <QUrlQuery>
 
@@ -766,6 +767,7 @@ Group dashboardInfoRecipe(const DashboardInfoHandler &handler)
                 handler(*dd->m_dashboardInfo);
             return SetupResult::StopWithSuccess;
         }
+        dd->m_networkAccessManager.setCookieJar(new QNetworkCookieJar); // remove old cookies
         return SetupResult::Continue;
     };
     const auto onDone = [handler](DoneWith result) {