Suspends this router.

def suspend(self):
        """
        Suspends this router.
        """

        status = yield from self.get_status()
        if status == "running":
            yield from self._hypervisor.send('vm suspend "{name}"'.format(name=self._name))
            self.status = "suspended"
            log.info('Router "{name}" [{id}] has been suspended'.format(name=self._name, id=self._id))