Add support pillar attr for apt-cacher

apt-cacher/files/apt-cacher.conf

+# vim:sts=2 ts=2 sw=2 et ai
+{% from "apt-cacher/map.jinja" import apt_cacher with context %}
 # This file is managed by Salt, do not edit by hand!!
-{% set apt_cacher = pillar.get('apt-cacher', {}) -%}
 #################################################################################
 # This is the config file for apt-cacher. On most Debian systems you can safely #
 # leave the defaults alone.                                                     #
 # sufficient permissions within the cache and log directories. Comment the
 # settings to run apt-cacher as the invoking user.
 #
-group = www-data
-user = www-data
+group = {{ apt_cacher.get('group', 'www-data') }} 
+user = {{ apt_cacher.get('user', 'www-data') }} 
 
 # optional setting, binds the listening daemon to specified IP(s).
 #
 # Specify an interface name, an IP address or a host name.
 # If unset, the default route is used.
 #
+{%- if apt_cacher.get('interface', 'False') != 'False'  %}
+interface = {{ apt_cacher.get('interface', 'False') }}
+{%- endif %}
 #interface = eth0
 
 # Rate limiting sets the maximum bandwidth in bytes per second to use for

apt-cacher/map.jinja

+{% set apt_cacher = salt['grains.filter_by']({
+    'Debian': {
+        'group': 'www-data',
+        'user': 'www-data',
+	'interface': 'False'
+    },
+}, merge=salt['pillar.get']('apt_cacher')) %}

pillar.example

 apt_cacher:
   host: cacher.mycompany.com
   admin_email: admin@mycompany.com
+  group: www-data
+  user: www-data
+  #ip for upstream connection
+  interface: 10.10.0.1
 
 apt_cacher_ng:
   # Setting up server_address is the minimal configuration requirement.