Generate the config files using a TOML parser

Now we don't need to change both the template and the resources to add
options

site-cookbooks/kosmos-parity/resources/node.rb

@@ -1,3 +1,5 @@
+require 'toml'
+
 provides :parity_node
 
 property :name, String, name_property: true
@@ -7,6 +9,7 @@ action :enable do
   node_name = name
 
   base_path = "#{node['kosmos-parity']['home_path']}/.local/share/io.parity.ethereum/#{name}"
+  config[:parity][:base_path] = base_path
 
   directory base_path do
     recursive true
@@ -24,11 +27,10 @@ action :enable do
 
   config_file = "#{base_path}/config.toml"
 
-  template config_file do
-    source    "config.toml.erb"
+  file config_file do
+    content   TOML::Generator.new(config).body
     owner     "parity"
     group     "parity"
-    variables config.merge(base_path: base_path)
   end
 
   execute "systemctl daemon-reload" do