Update the store id attached to the second customer when dealing with new newsletter subscription mapping

Author: dmanners

dev/tests/integration/testsuite/Magento/Newsletter/_files/subscribers.php

@@ -28,7 +28,7 @@
 
 $subscriber = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()
     ->create(\Magento\Newsletter\Model\Subscriber::class);
-$subscriber->setStoreId($otherStore)
+$subscriber->setStoreId($currentStore)
     // Intentionally setting ID to 0 instead of 2 to test fallback mechanism in Subscriber model
     ->setCustomerId(0)
     ->setSubscriberEmail('customer_two@example.com')