As reported by Pontus Amberg in the mailing list:
"I've encountered random test failures in the
test where "this.notifiable.stoppedCalled" is false. I'm not sure but does
super.stop() in SlingFelix set m_shutdownGate in Felix to null and is there
a possibility that it will do so before the Notifier instance in SlingFelix is
Take a look at the stop() methods in SlingFelix where the Notifier
is started and super.stop() is invoked."