Add automated StrongSwan test

server/site_tests/network_VPN/050IPSecGenesis

Index: server/site_tests/network_VPN/050IPSecGenesis
diff --git a/server/site_tests/network_VPN/050IPSecGenesis b/server/site_tests/network_VPN/050IPSecGenesis
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+# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# An example of how to set up an IPSec VPN from the Client (DUT),
+# through the Router to to the Server.
+#
+
+{ "name" : "VPNIPsecGenesis",
+  "steps":[
+    #  Create WiFi connection from Client to Router.
+    [ "create",         { "type" : "hostap" } ],
+    [ "config",         { "channel" : "2412", "mode" : "11b" } ],
+    [ "connect",        { "security" : "none" } ],
+
+    # The text '@ipsecrets-ip@' is automtically replaced with the
+    # correct server IP for the current test configuration, and should
+    # not be replaced through this list of steps; in fact, any
+    # replacements will be automatically overridden.
+    #
+    # The text '@local-listen-ip@' is also replaced with the IP number
+    # of the interface connected to the WiFi router.  The default is
+    # 'wifi_addr' (192.168.2.254), and it should not be replaced this
+    # list of steps; in fact, any replacements will be automatically
+    # overridden.  Configure and launch the VPN server.  Automatically
+    # kills any previously running server.
+    #
+    [ "vpn_server_config", {
+                "kind" : "l2tpipsec",
+                "replacements" : { "@plutodebug@" : "all" }}],
+
+    #  Launch the VPN Client.
+    [ "vpn_client_config", { "kind"       : "l2tpipsec-psk",
+                             "password"   : "password",  # ipsec.secrets
+                             "chapuser"   : "chapuser",  # chap-secrets
+                             "chapsecret" : "chapsecret" # chap-secrets
+                           }],
+
+    # Verify the client is connected to the server
+    [ "client_ping",       { "ping_ip" : "192.168.1.99", # IP in xl2tpd.conf.
+                             "count" : "10" } ],
+
+    [ "vpn_client_kill" ],       # Shut down the VPN Client.
+    [ "vpn_server_kill" ],       # Shut down the VPN Server.
+    [ "disconnect" ],            # Disconnect WiFi setup
+    ],
+}