Broadcast an instance change request to all the remaining nodes

        :param view_no: the view number when the instance change is requested

def sendInstanceChange(self, view_no: int,
                           suspicion=Suspicions.PRIMARY_DEGRADED):
        """
        Broadcast an instance change request to all the remaining nodes

        :param view_no: the view number when the instance change is requested
        """

        # If not found any sent instance change messages in last
        # `ViewChangeWindowSize` seconds or the last sent instance change
        # message was sent long enough ago then instance change message can be
        # sent otherwise no.
        canSendInsChange, cooldown = self.insChngThrottler.acquire()
        if canSendInsChange:
            logger.info(
                "{}{} sending an instance change with view_no {}"
                " since {}".format(
                    VIEW_CHANGE_PREFIX,
                    self,
                    view_no,
                    suspicion.reason))
            logger.info("{}{} metrics for monitor: {}"
                        .format(MONITORING_PREFIX, self,
                                self.provider.pretty_metrics()))
            msg = self._create_instance_change_msg(view_no, suspicion.code)
            self.send(msg)
            # record instance change vote for self and try to change the view
            # if quorum is reached
            self._on_verified_instance_change_msg(msg, self.name)
        else:
            logger.info("{} cannot send instance change sooner then {} seconds".format(self, cooldown))