Add automated StrongSwan test

server/site_tests/network_VPN/000VPNGenesis

Index: server/site_tests/network_VPN/000VPNGenesis
diff --git a/server/site_tests/network_VPN/000VPNGenesis b/server/site_tests/network_VPN/000VPNGenesis
index e504dffa30c262572c31c4443eb89e8f2c15c828..726b99a79ded54e7a28f815a1cd4c1484c52765a 100644
--- a/server/site_tests/network_VPN/000VPNGenesis
+++ b/server/site_tests/network_VPN/000VPNGenesis
@@ -65,8 +65,8 @@
                              }],
     # Having two vpn_server_config invocations back-to-back results in
     # a failure with 'pkill' right after an rspro boot.  There seems
-    # to be some significant latency when starting openvpn the first
-    # time, so slow the system down a tad to avoid spurious errors.
+    # to be some significant latency when starting the first time, so
+    # slow the system down a tad to avoid spurious errors.

[Sam Leffler, 2011/03/31 17:11:27]

is there some way to synchronize the controlling host--such as waiting for an
echo to complete after the pkill?  using a sleep makes me nervous

[thutt, 2011/04/05 21:38:21]

Possibly.  Are you proposing something as simple as running an 'echo ' on the
client, or is there something more complicated you had in mind?

     [ "sleep", { "time": "1" } ],
     [ "vpn_server_config", { "kind" : "openvpn",
                              "config" : { "comp-lzo":"" }