Handle/process scheduled task stop

		:param watchdog: watchdog of task that was stopped

		:return: None

def task_finished(self, watchdog):
		""" Handle/process scheduled task stop

		:param watchdog: watchdog of task that was stopped

		:return: None
		"""
		if watchdog in self.__running_registry:  # when cleanup hits stop
			self.__running_registry.remove(watchdog)
			self.__done_registry.append(watchdog)
			self.cleanup_event().set()