testing: Add ikev2/mobike-virtual-ip-nat scenario

This tests moving from a public IP behind a NAT and back (with proper
changes of the UDP encapsulation).

testing/tests/ikev2/mobike-virtual-ip-nat/test.conf

@@ -0,0 +1,21 @@
+#!/bin/bash
+#
+# This configuration file provides information on the
+# guest instances used for this test
+
+# All guest instances that are required for this test
+#
+VIRTHOSTS="alice moon winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-w-s-b.png"
+
+# Guest instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="bob moon sun"
+
+# Guest instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="alice sun"