MAGETWO-58503: [Backport] - [Github] Add Configurable Product To Cart from Category Page #2574 #5850 #5882 #6572 #5558 #8470 - for 2.1

Author: OlgaVasyltsun

dev/tests/functional/tests/app/Magento/Catalog/Test/Page/Category/CatalogCategoryView.xml

@@ -15,5 +15,6 @@
         <block name="listProductBlock" class="Magento\Catalog\Test\Block\Product\ListProduct" locator=".products.wrapper.grid" strategy="css selector"/>
         <block name="topToolbar" class="Magento\Catalog\Test\Block\Product\ProductList\TopToolbar" locator=".//*[contains(@class,'toolbar-products')][1]" strategy="xpath"/>
         <block name="bottomToolbar" class="Magento\Catalog\Test\Block\Product\ProductList\BottomToolbar" locator=".//*[contains(@class,'toolbar-products')][2]" strategy="xpath"/>
+        <block name="messagesBlock" class="Magento\Backend\Test\Block\Messages" locator=".page.messages" strategy="css selector" />
     </page>
 </config>

dev/tests/functional/tests/app/Magento/Swatches/Test/TestStep/AddProductToCartFromCatalogCategoryPageStep.php

@@ -94,6 +94,7 @@ public function run()
                 ],
             ],
         ];
+        $this->categoryView->getMessagesBlock()->waitSuccessMessage();
 
         return [
             'cart' => $this->fixtureFactory->createByCode('cart', $cart),