Make compatible with JSignPDF 2.0.0

On JSignPDF 2.0.0 the log library was changed and the message:
INFO  Finished: Signature succesfully created.
now return:
INFO Finished: Signature succesfully created.
without space between INFO and Finished.

To make compatible I removed the word INFO

Author: vitormattos

src/Sign/JSignService.php

@@ -27,7 +27,7 @@ public function sign(JSignParam $params)
             exec($commandSign, $output);
 
             $out            = json_encode($output);
-            $messageSuccess = "INFO  Finished: Signature succesfully created.";
+            $messageSuccess = "Finished: Signature succesfully created.";
             $isSigned       = strpos($out, $messageSuccess) !== false;
 
             $this->throwIf(!$isSigned, "Error to sign PDF. $out");