test fixes (#22833: Short-term admin accounts)

Author: lfolco

app/code/Magento/Security/Model/UserExpiration/Validator.php

@@ -19,6 +19,11 @@ class Validator extends AbstractValidator
     /**@var \Magento\Framework\Stdlib\DateTime\DateTime */
     private $dateTime;
 
+    /**
+     * Validator constructor.
+     *
+     * @param \Magento\Framework\Stdlib\DateTime\DateTime $dateTime
+     */
     public function __construct(
         \Magento\Framework\Stdlib\DateTime\DateTime $dateTime
     ) {

dev/tests/integration/testsuite/Magento/Security/Model/Plugin/AuthSessionTest.php

@@ -7,6 +7,7 @@
 
 /**
  * @magentoAppIsolation enabled
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
 class AuthSessionTest extends \PHPUnit\Framework\TestCase
 {

dev/tests/integration/testsuite/Magento/Security/Model/UserExpirationManagerTest.php

@@ -9,6 +9,8 @@
 
 /**
  * Tests for \Magento\Security\Model\UserExpirationManager
+ *
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
 class UserExpirationManagerTest extends \PHPUnit\Framework\TestCase
 {