Fixed reset method usage

Author: Stanislav Idolov

app/code/Magento/Rule/Model/Condition/AbstractCondition.php

@@ -83,11 +83,13 @@ public function __construct(Context $context, array $data = [])
 
         $options = $this->getAttributeOptions();
         if ($options) {
-            $this->setAttribute(key(reset($options)));
+            reset($options);
+            $this->setAttribute(key($options));
         }
         $options = $this->getOperatorOptions();
         if ($options) {
-            $this->setOperator(key(reset($options)));
+            reset($options);
+            $this->setOperator(key($options));
         }
     }
 
@@ -506,7 +508,8 @@ public function getAttributeElement()
         if (null === $this->getAttribute()) {
             $options = $this->getAttributeOption();
             if ($options) {
-                $this->setAttribute(key(reset($options)));
+                reset($options);
+                $this->setAttribute(key($options));
             }
         }
         return $this->getForm()->addField(
@@ -542,7 +545,7 @@ public function getOperatorElement()
     {
         $options = $this->getOperatorSelectOptions();
         if ($this->getOperator() === null) {
-            $option = current(reset($options));
+            $option = reset($options);
             $this->setOperator($option['value']);
         }