Move wormhole from barnard to nodejs-2

Fixed two small bugs in the recipe:

* hubot user wasn't created when necessary
* systemd template always included redis service dependency

nodes/nodejs-2.json

@@ -65,6 +65,7 @@
   },
   "run_list": [
     "recipe[kosmos-base]",
+    "recipe[kosmos-hubot::wormhole]",
     "role[kredits_github]"
   ]
-}
+}