List floating IPs

        .. versionadded:: 2016.3.0

def floating_ip_list(self):
        '''
        List floating IPs

        .. versionadded:: 2016.3.0
        '''
        nt_ks = self.compute_conn
        floating_ips = nt_ks.floating_ips.list()
        response = {}
        for floating_ip in floating_ips:
            response[floating_ip.ip] = {
                'ip': floating_ip.ip,
                'fixed_ip': floating_ip.fixed_ip,
                'id': floating_ip.id,
                'instance_id': floating_ip.instance_id,
                'pool': floating_ip.pool
            }
        return response