code: def get_error_message(self):
          
          error_reason = self.get_error_reason()
          if error_reason:
              error_message = error_reason.get('pod') or None
              if error_message:
                  return "Error in pod: %s" % error_message
              plugin = error_reason.get('plugin')[0] or None
              error_message = error_reason.get('plugin')[1] or None
              if error_message:
                  # Plugin has non-empty error description
                  return "Error in plugin %s: %s" % (plugin, error_message)
              else:
                  return "Error in plugin %s" % plugin
docs: Return an error message based on atomic-reactor's metadata