We are, arguably, not testing QProcess and its ability to start or finish,
we test QUdpSocket. If, for some reason (as we discovered on some
specific machines recently) the process does not start or does not produce
any output (canReadLine), we QSKIP instead of failing. Also, all those
QCOMPARE will bypass the part there we stop processes - so must be
RAII-protected.
Fixes: QTBUG-82717
Change-Id: Idfb0d4a483d753f336b3827875eeaf51c79270e2
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>