upgraded pfkey scenarios to 5.0.0

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

@@ -0,0 +1,8 @@
+sun::ipsec stop
+alice::ipsec stop
+venus::ipsec stop
+alice::/etc/init.d/iptables stop 2> /dev/null
+venus::/etc/init.d/iptables stop 2> /dev/null
+sun::/etc/init.d/iptables stop 2> /dev/null
+moon::iptables -t nat -F
+moon::conntrack -F