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

site-cookbooks/kosmos-hubot/recipes/wormhole.rb

@@ -32,6 +32,7 @@ build_essential app_name do
 end
 
 include_recipe "kosmos-nodejs"
+include_recipe "kosmos-hubot::_user"
 
 application app_path do
   data_bag = Chef::EncryptedDataBagItem.load('credentials', app_name)
@@ -62,6 +63,7 @@ application app_path do
     action :nothing
   end
 
+  # TODO use chef systemd_service resource
   template "/lib/systemd/system/#{app_name}.service" do
     source 'nodejs.systemd.service.erb'
     owner 'root'
@@ -70,6 +72,7 @@ application app_path do
     variables(
       user: app_user,
       group: app_group,
+      without_redis: true,
       app_dir: app_path,
       entry: "#{app_path}/bin/hubot -a irc --name #{app_name}",
       environment: {

site-cookbooks/kosmos-hubot/templates/default/nodejs.systemd.service.erb

@@ -1,7 +1,9 @@
 [Unit]
 Description=Start nodejs app
+<% unless @without_redis %>
 Requires=redis-server.service
 After=redis-server.service
+<% end %>
 
 [Service]
 ExecStart=<%= @entry %>