fix: correct Run Deploy tests (GoogleCloudPlatform#1941)

Author: glasnt

run/helloworld/test/DeployTest.php

@@ -30,7 +30,7 @@
  * Class DeployTest.
  * @group deploy
  */
-class DeloyTest extends TestCase
+class DeployTest extends TestCase
 {
     use DeploymentTrait;
     use EventuallyConsistentTestTrait;
@@ -111,7 +111,7 @@ public function testService()
         // Run the test.
         $resp = $client->get('/');
         $this->assertEquals('200', $resp->getStatusCode());
-        $this->assertEquals('Hello World!', (string) $resp->getBody());
+        $this->assertStringContainsString('Hello World!', (string) $resp->getBody());
     }
 
     public function getBaseUri()