testing: wait until connections are loaded

testing/tests/pfkey/nat-rw/pretest.dat

@@ -3,9 +3,10 @@ venus::iptables-restore < /etc/iptables.rules
 sun::iptables-restore < /etc/iptables.rules
 moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p udp -j SNAT --to-source PH_IP_MOON:1024-1100
 moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p tcp -j SNAT --to-source PH_IP_MOON:2000-2100
+sun::ipsec start
 alice::ipsec start
 venus::ipsec start
-sun::ipsec start
+sun::expect-connection nat-t
 alice::expect-connection nat-t
 alice::ipsec up nat-t
 venus::expect-connection nat-t