fix undefined method isAllowedForRuleCondition

Author: yaroslav-zenin

app/code/Magento/SalesRule/Model/Rule/Condition/Product.php

@@ -68,9 +68,8 @@ public function loadAttributeOptions()
         $attributes = [];
         foreach ($productAttributes as $attribute) {
             /* @var $attribute \Magento\Catalog\Model\ResourceModel\Eav\Attribute */
-            if (!$attribute->isAllowedForRuleCondition()
-                || !$attribute->getDataUsingMethod($this->_isUsedForRuleProperty)
-            ) {
+            if (!$attribute->getDataUsingMethod($this->_isUsedForRuleProperty)
+                || !$attribute->isAllowedForRuleCondition()) {
                 continue;
             }
             $frontLabel = $attribute->getFrontendLabel();