force update to router as if there is child id request

def updateRouterStatus(self):
        """force update to router as if there is child id request"""
        print '%s call updateRouterStatus' % self.port
        cmd = 'state'
        while True:
            state = self.__sendCommand(cmd)[0]
            if state == 'detached':
                continue
            elif state == 'child':
                break
            else:
                return False

        cmd = 'state router'
        return self.__sendCommand(cmd)[0] == 'Done'