add log describing how to setup test server

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

doc/dev/logs/2011-05-10

@@ -0,0 +1,11 @@
+How to create a benchmark / testhost:
+
+- Add testhost
+- Generate ssh key pair
+- Add generated ssh key pair to root keys
+- Deploy to all hosts, so they have the pubkey of your testhost
+- Done. You can use the benchmark host.
+
+
+--------------------------------------------------------------------------------
+cdist-mass-deploy -p rnic01 rnic02  2.32s user 1.99s system 48% cpu 8.825 total