MAGETWO-54682: [Customer] Fast load of product options

 - revert BC changes

Author: kandy

app/code/Magento/Catalog/Model/Product/Attribute/Backend/Media.php

@@ -372,4 +372,19 @@ protected function copyImage($file)
             );
         }
     }
+
+    /**
+     * @deprecated
+     * @param string $key
+     * @param string[] &$image
+     * @return string
+     */
+    protected function findDefaultValue($key, &$image)
+    {
+        if (isset($image[$key . '_default'])) {
+            return $image[$key . '_default'];
+        }
+
+        return '';
+    }
 }

app/code/Magento/ConfigurableProduct/Model/ResourceModel/Product/Type/Configurable/Attribute/Collection.php

@@ -184,6 +184,21 @@ protected function _addProductAttributes()
         return $this;
     }
 
+    /**
+     * Add Associated Product Filters (From Product Type Instance)
+     *
+     * @deprecated
+     * @return $this
+     */
+    public function _addAssociatedProductFilters()
+    {
+        $this->getProductType()->getUsedProducts(
+            $this->getProduct(),
+            $this->getColumnValues('attribute_id') // Filter associated products
+        );
+        return $this;
+    }
+
     /**
      * Load attribute labels
      *

app/code/Magento/Customer/Model/Metadata/CachedMetadata.php

@@ -32,6 +32,30 @@ class CachedMetadata implements MetadataInterface
      */
     protected $metadata;
 
+    /**
+     * @deplacated
+     * @var array
+     */
+    protected $attributeMetadataCache = [];
+
+    /**
+     * @deplacated
+     * @var array
+     */
+    protected $attributesCache = [];
+
+    /**
+     * @deplacated
+     * @var \Magento\Customer\Api\Data\AttributeMetadataInterface[]
+     */
+    protected $allAttributeMetadataCache = null;
+
+    /**
+     * @deplacated
+     * @var \Magento\Customer\Api\Data\AttributeMetadataInterface[]
+     */
+    protected $customAttributesMetadataCache = null;
+
     /**
      * Initialize dependencies.
      *