Fix test case

[roxblnfk]

We need to figure out why the Harness test sometimes fails in CI.
This may be related to how many tests were executed before it.

sdk-php/tests/Acceptance/Harness/Schedule/BasicTest.php

Lines 67 to 75 in 28538c1

	// Confirm simple list
	$found = false;
	foreach ($client->listSchedules() as $schedule) {
	if ($schedule->scheduleId === $scheduleId) {
	$found = true;
	break;
	}
	}
	$found or throw new \Exception('Schedule not found');