testing: Converted ipv6/net2net-ikev1 to swanctl

testing/tests/ipv6/net2net-ikev1/pretest.dat

@@ -6,8 +6,9 @@ alice::"ip route add fec2:\:/16 via fec1:\:1"
 moon::"ip route add fec2:\:/16 via fec0:\:2"
 sun::"ip route add fec1:\:/16 via fec0:\:1"
 bob::"ip route add fec1:\:/16 via fec2:\:1"
-moon::ipsec start
-sun::ipsec start
+moon::systemctl start strongswan-swanctl
+sun::systemctl start strongswan-swanctl
 moon::expect-connection net-net
 sun::expect-connection net-net
-moon::ipsec up net-net
+moon::swanctl --initiate --child net-net 2> /dev/null
+moon::sleep 1