MTA-552: Re-factor Test for Create Product with New Category

- Fixed isolation on configurable variations

Author: orykh

dev/tests/functional/tests/app/Magento/ConfigurableProduct/Test/Block/Adminhtml/Product/Edit/Tab/Super/Config.php

@@ -99,6 +99,9 @@ public function fillFormTab(array $fields, SimpleElement $element = null)
         $attributesValue = isset($fields['configurable_attributes_data']['source'])
             ? $fields['configurable_attributes_data']['source']->getAttributesData()
             : [];
+        foreach ($attributesValue as $key => $value) {
+            $attributesValue[$key] = array_merge($value, $attributes['attributes_data'][$key]);
+        }
         $this->getAttributeBlock()->fillAttributes($attributesValue);
         if (!empty($attributes['matrix'])) {
             $this->generateVariations();