Split node config into separate recipes, support account creation

The account is automatically created and added to the list of accounts
that are unlocked (can send without a password)

site-cookbooks/kosmos-parity/recipes/node_testnet.rb

@@ -0,0 +1,27 @@
+#
+# Cookbook Name:: kosmos-parity
+# Recipe:: node_testnet
+#
+# Copyright 2017, Kosmos
+#
+# All rights reserved - Do Not Redistribute
+#
+
+parity_node "testnet" do
+  config parity: {
+           chain: "ropsten",
+         },
+         network: {
+           port: 30304,
+         },
+         rpc: {
+           port: 8546,
+         },
+         dapps: {
+           port: 8091,
+         },
+         ui: {
+           port: 8181,
+         }
+end
+