Update apt cookbook

cookbooks/apt/recipes/cacher-ng.rb

@@ -1,8 +1,8 @@
 #
-# Cookbook Name:: apt
+# Cookbook:: apt
 # Recipe:: cacher-ng
 #
-# Copyright 2008-2013, Chef Software, Inc.
+# Copyright:: 2008-2017, Chef Software, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the 'License');
 # you may not use this file except in compliance with the License.
@@ -17,23 +17,19 @@
 # limitations under the License.
 #
 
-node.set['apt']['caching_server'] = true
-
-package 'apt-cacher-ng' do
-  action :install
-end
+package 'apt-cacher-ng'
 
 directory node['apt']['cacher_dir'] do
   owner 'apt-cacher-ng'
   group 'apt-cacher-ng'
-  mode 0755
+  mode '0755'
 end
 
 template '/etc/apt-cacher-ng/acng.conf' do
   source 'acng.conf.erb'
   owner 'root'
   group 'root'
-  mode 00644
+  mode '0644'
   notifies :restart, 'service[apt-cacher-ng]', :immediately
 end