[FIX] hr_attendance_rifd: catch ValidationError

in a way RFID devices can handle it

Author: lubusax

hr_attendance_rfid/models/hr_employee.py

@@ -72,6 +72,6 @@ def register_attendance(self, card_code):
                 res["error_message"] = msg
                 return res
         except Exception as e:
-            res["error_message"] = str(e)
-            _logger.error(str(e))
+            res["error_message"] = repr(e)
+            _logger.error(repr(e))
         return res