When migrating QFtp test to docker server, it seems it is easy to get
"QTestEventLoop::instance().timeout()" during the test in Coin network.
To move the task of migration forward, those flaky timeout errors will
be ignored for short-term.
Task-number: QTBUG-75549
Change-Id: I797952b82c0ceb637f40c77fac2a88ca2a9a0eae
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>