Fetches a loadbalancer agent hosting a loadbalancer.

def get_lbaas_agent_hosting_loadbalancer(self, loadbalancer, **_params):
        """Fetches a loadbalancer agent hosting a loadbalancer."""
        return self.get((self.lbaas_loadbalancer_path +
                         self.LOADBALANCER_HOSTING_AGENT) % loadbalancer,
                        params=_params)