MAGETWO-44566: Unable to get rates for online shipping carriers on server with...

MAGETWO-44566: Unable to get rates for online shipping carriers on server with php-fpm, php version 5.6

lib/internal/Magento/Framework/Xml/Security.php

@@ -21,7 +21,7 @@ class Security
      */
     private function heuristicScan($xmlContent)
     {
-        return strpos($xmlContent, '<!ENTITY') !== false;
+        return strpos($xmlContent, '<!ENTITY') === false;
     }
 
     /**