add a conditional to exception handler just in case

Author: Tim Vaillancourt

MongoBackup/Backup.py

@@ -143,11 +143,11 @@ def cleanup_and_exit(self, code, frame):
                     self.backup_name
                 ))
 
-            logging.info("Cleanup complete. Exiting")
-
             if self._lock:
                 self._lock.release()
 
+            logging.info("Cleanup complete. Exiting")
+
             sys.exit(1)
 
     def exception(self, error_message):