added ikev2/dhcp-dynamic scenario

testing/tests/ikev2/dhcp-dynamic/hosts/moon/etc/strongswan.conf

@@ -0,0 +1,10 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random x509 hmac xcbc stroke kernel-netlink socket-default updown attr farp dhcp
+  plugins {
+    dhcp {
+      server = 10.1.255.255
+    }
+  }
+}