ACP2E-1776: Creating customer(-s) via Async REST API ignores group_id

Author: AnujNehra

app/code/Magento/Customer/Test/Unit/Model/AccountManagementApiTest.php

@@ -238,10 +238,15 @@ class AccountManagementApiTest extends TestCase
     private $customerSecure;
 
     /**
-     * @var StoreInterface
+     * @var StoreInterface|MockObject
      */
     private $storeMock;
 
+    /**
+     * @var Store|MockObject
+     */
+    private $store;
+
     /**
      * @inheritDoc
      * @SuppressWarnings(PHPMD.ExcessiveMethodLength)