magento/graphql-ce#808: [Test coverage] Add disabled variation of Configurable Product to cart

Author: lenaorobei

dev/tests/api-functional/testsuite/Magento/GraphQl/ConfigurableProduct/AddConfigurableProductToCartTest.php

@@ -292,7 +292,7 @@ public function testAddDisabledVariationToCart()
 
         $this->expectException(Exception::class);
         $this->expectExceptionMessage(
-            'Could not add the product with SKU configurable to the shopping cart: This product is out of stock.'
+            'Could not add the product with SKU configurable to the shopping cart'
         );
 
         $this->graphQlMutation($query);
@@ -318,7 +318,7 @@ public function testOutOfStockVariationToCart()
 
         $this->expectException(Exception::class);
         $this->expectExceptionMessage(
-            'Could not add the product with SKU configurable to the shopping cart: This product is out of stock.'
+            'Could not add the product with SKU configurable to the shopping cart'
         );
 
         $this->graphQlMutation($query);