Fix error handler when no structured error is present

Author: polyfractal

src/Elasticsearch/Connections/Connection.php

@@ -683,6 +683,6 @@ private function tryDeserializeError($response, $errorClass)
         }
 
         // Response mangled or unexpected, just return the body
-        return new $errorClass($error, $response['body']);
+        return new $errorClass($response['body']);
     }
 }