MAGETWO-54263: [FT] OnlineRefundTest and CloseOrderTest is failed by syntax...

MAGETWO-54263: [FT] OnlineRefundTest and CloseOrderTest is failed by syntax error in Magento\Tax\Test\Handler\Curl\RemoveTaxRule.php

dev/tests/functional/tests/app/Magento/Tax/Test/Handler/Curl/RemoveTaxRule.php

@@ -39,9 +39,9 @@ class RemoveTaxRule extends Curl
     public function persist(FixtureInterface $fixture = null)
     {
         $this->taxRuleGridUrl = $_ENV['app_backend_url'] . 'tax/rule/index/';
-        $curl = $this->_getCurl($this->taxRuleGridUrl);
+        $curl = $this->getCurl($this->taxRuleGridUrl);
         $response = $curl->read();
-        $this->_removeTaxRules($response);
+        $this->removeTaxRules($response);
         $curl->close();
         return $response;
     }