We don't want the signal dumper to pick up signals that our own
test machinery produces, such as the ones emitted from the watchdog
thread startup and shutdown. This would otherwise produce:
tst_Signaldumper::initTestCase() Signal: QThread(7fc969e0d870) started ()
At startup, and at shutdown even more confusingly:
tst_Signaldumper::UnknownTestFunc() Signal: QThread(7fc969e0d870) finished ()
Change-Id: I9e81fa168eaa92551d38d5576973bbf95ac23364
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
e7371c19d9