testing: Converted ipv6/rw-psk-ikev2 to swanctl

testing/tests/ipv6/rw-psk-ikev2/hosts/dave/etc/strongswan.conf

@@ -1,5 +1,18 @@
 # /etc/strongswan.conf - strongSwan configuration file
 
-charon {
-  load = random nonce aes sha1 sha2 curve25519 hmac stroke kernel-netlink socket-default updown
+swanctl {
+  load = pem pkcs1 x509 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+  load = random nonce aes sha1 sha2 curve25519 hmac vici kernel-netlink socket-default updown
+
+  syslog {
+    daemon {
+      default = 1
+    }
+    auth {
+      default = 0
+    }
+  }
 }