converted all ipv6 iptables/ip6tables scenarios

testing/tests/ipv6/host2host-ikev2/pretest.dat

@@ -1,5 +1,7 @@
-moon::/etc/init.d/iptables start 2> /dev/null
-sun::/etc/init.d/iptables start 2> /dev/null
+moon::iptables-restore < /etc/iptables.drop
+sun::iptables-restore < /etc/iptables.drop
+moon::ip6tables-restore < /etc/ip6tables.rules
+sun::ip6tables-restore < /etc/ip6tables.rules
 moon::ipsec start
 sun::ipsec start
 moon::expect-connection host-host