converted all p2pnat iptables scenarios

testing/tests/p2pnat/behind-same-nat/posttest.dat

@@ -1,8 +1,8 @@
 venus::ipsec stop
 alice::ipsec stop
 carol::ipsec stop
-alice::/etc/init.d/iptables stop 2> /dev/null
-carol::/etc/init.d/iptables stop 2> /dev/null
-venus::/etc/init.d/iptables stop 2> /dev/null
+alice::iptables-restore < /etc/iptables.flush
+carol::iptables-restore < /etc/iptables.flush
+venus::iptables-restore < /etc/iptables.flush
 moon::iptables-restore < /etc/iptables.flush
 moon::conntrack -F