PWA-806: Localize emails sent through GraphQL application

- Fix issue with localization lange pack fixture

Author: davemacaulay

dev/tests/integration/testsuite/Magento/CustomerGraphQl/Model/Resolver/CreateCustomerTest.php

@@ -231,7 +231,7 @@ public function testCreateCustomerForStoreSendsTranslatedEmail()
         $this->assertEquals('test@magento.com', $sentMessage->getTo()[0]->getEmail());
 
         // Assert the email contains the expected content
-        $this->assertEquals('Bienvenue sur Test Group.', $sentMessage->getSubject());
+        $this->assertEquals('Bienvenue sur Test Group', $sentMessage->getSubject());
         $messageRaw = $sentMessage->getBody()->getParts()[0]->getRawContent();
         $this->assertStringContainsString('Bienvenue sur Test Group.', $messageRaw);
     }

dev/tests/integration/testsuite/Magento/CustomerGraphQl/_files/french/fr_fr/registration.php

@@ -6,4 +6,4 @@
 
 use Magento\Framework\Component\ComponentRegistrar;
 
-ComponentRegistrar::register(ComponentRegistrar::LANGUAGE, 'french', __DIR__);
+ComponentRegistrar::register(ComponentRegistrar::LANGUAGE, 'french_fr_fr', __DIR__);