ACP2E-13: Customer shopping cart in admin - Multi store

- add step in test
- fix static fails

Author: o-dubovyk

app/code/Magento/ConfigurableProduct/Model/Product/Type/Configurable.php

@@ -36,7 +36,7 @@ class Configurable extends \Magento\Catalog\Model\Product\Type\AbstractType
     /**
      * Product type code
      */
-    const TYPE_CODE = 'configurable';
+    public const TYPE_CODE = 'configurable';
 
     /**
      * Cache key for Used Product Attribute Ids

app/code/Magento/ConfigurableProduct/Test/Mftf/Test/AdminUpdatesConfigurableProductOptionsInCustomersCartTest.xml

@@ -151,6 +151,7 @@
             <actionGroup ref="RemoveProductFromMiniCartActionGroup" stepKey="clearShoppingCartForDefaultWebsite">
                 <argument name="productName" value="$createConfigProduct.name$"/>
             </actionGroup>
+            <actionGroup ref="StorefrontCustomerLogoutActionGroup" stepKey="logoutStorefront"/>
 
             <!-- Delete Configurable and Child Products, Delete Category and Attribute -->
             <actionGroup ref="DeleteProductBySkuActionGroup" stepKey="deleteConfigurableProduct">

app/code/Magento/Customer/Controller/Adminhtml/Cart/Product/Composite/Cart.php

@@ -23,7 +23,7 @@ abstract class Cart extends \Magento\Backend\App\Action
      *
      * @see _isAllowed()
      */
-    const ADMIN_RESOURCE = 'Magento_Customer::manage';
+    public const ADMIN_RESOURCE = 'Magento_Customer::manage';
 
     /**
      * Customer we're working with