MAGETWO-87147: Fix bundled product dynamic enum

Author: Eric Bohanon

app/code/Magento/BundleGraphQl/Model/Resolver/Products/Query/BundleProductPostProcessor.php

@@ -104,7 +104,7 @@ public function process(array $resultData)
                                 'price_type' => $this->enumLookup->getEnumValueFromField(
                                     'PriceTypeEnum',
                                     $link->getPriceType()
-                                ),
+                                ) ?: 'DYNAMIC',
                                 'can_change_quantity' => $link->getCanChangeQuantity()
                             ];
                             $resultData[$productKey]['items'][$optionKey]['options'][$link['sku']] = $formattedLink;

app/code/Magento/BundleGraphQl/etc/graphql.xml

@@ -48,5 +48,6 @@
     <type xsi:type="Enum" name="PriceTypeEnum">
         <item name="fixed">FIXED</item>
         <item name="percent">PERCENT</item>
+        <item name="dynamic">DYNAMIC</item>
     </type>
 </config>