Move the hidden service attributes to the attributes file

When it is set in the recipe the hidden service dir doesn't get set
correctly (nil), resulting in a broken torrc file

site-cookbooks/kosmos-mastodon/attributes/default.rb

@@ -4,3 +4,7 @@ node.default["kosmos-mastodon"]["streaming_port"]  = 4000
 node.default["kosmos-mastodon"]["server_name"]     = "kosmos.social"
 node.default["kosmos-mastodon"]["redis_url"]       = "redis://localhost:6379/1"
 node.default["kosmos-mastodon"]["sidekiq_threads"] = 25
+
+node.override["tor"]["HiddenServices"]["mastodon"] = {
+  "HiddenServicePorts" => ["80 127.0.0.1:80"]
+}