testing: Added ikev1 xfrm mark scenarios.

testing/tests/ikev1/nat-two-rw-mark/posttest.dat

@@ -0,0 +1,11 @@
+sun::iptables -t mangle -v -n -L PREROUTING
+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
+sun::conntrack -F
+sun::rm /etc/mark_updown