graphQl-786: fixed the quantity field in the bundle product

Author: Vitaliy Boyko

app/code/Magento/BundleGraphQl/Model/Resolver/Links/Collection.php

@@ -117,7 +117,7 @@ private function fetch() : array
                 'price' => $link->getSelectionPriceValue(),
                 'position' => $link->getPosition(),
                 'id' => $link->getSelectionId(),
-                'qty' => (int)$link->getSelectionQty(),
+                'quantity' => (int)$link->getSelectionQty(),
                 'is_default' => (bool)$link->getIsDefault(),
                 'price_type' => $this->enumLookup->getEnumValueFromField(
                     'PriceTypeEnum',

app/code/Magento/BundleGraphQl/etc/schema.graphqls

@@ -14,7 +14,7 @@ type BundleItem @doc(description: "BundleItem defines an individual item in a bu
 type BundleItemOption @doc(description: "BundleItemOption defines characteristics and options for a specific bundle item.") {
     id: Int @doc(description: "The ID assigned to the bundled item option.")
     label: String @doc(description: "The text that identifies the bundled item option.") @resolver(class: "Magento\\BundleGraphQl\\Model\\Resolver\\Options\\Label")
-    qty: Float @doc(description: "Indicates the quantity of this specific bundle item.")
+    quantity: Float @doc(description: "Indicates the quantity of this specific bundle item.")
     position: Int @doc(description: "When a bundle item contains multiple options, the relative position of this option compared to the other options.")
     is_default: Boolean @doc(description: "Indicates whether this option is the default option.")
     price: Float @doc(description: "The price of the selected option.")

dev/tests/api-functional/testsuite/Magento/GraphQl/Bundle/BundleProductViewTest.php

@@ -58,7 +58,7 @@ public function testAllFieldsBundleProducts()
               sku              
               options {
                 id
-                qty
+                quantity
                 position
                 is_default
                 price
@@ -143,7 +143,7 @@ public function testBundleProductWithNotVisibleChildren()
               sku              
               options {
                 id
-                qty
+                quantity
                 position
                 is_default
                 price
@@ -269,7 +269,7 @@ private function assertBundleProductOptions($product, $actualResponse)
             $actualResponse['items'][0]['options'][0],
             [
                 'id' => $bundleProductLink->getId(),
-                'qty' => (int)$bundleProductLink->getQty(),
+                'quantity' => (int)$bundleProductLink->getQty(),
                 'position' => $bundleProductLink->getPosition(),
                 'is_default' => (bool)$bundleProductLink->getIsDefault(),
                  'price_type' => self::KEY_PRICE_TYPE_FIXED,