Issue 311 - Switch to a current Ubuntu image for infrastructure testing

modules/base/manifests/init.pp

 class base {
   stage {'pre': before => Stage['main']}
   stage {'post': require => Stage['main']}
 
   class {'users':
     stage => 'pre',
   }
 
   class {'apt':
     always_apt_update => true
   }
 
   Exec['apt_update'] -> Package <| |>
 
   include private::users, postfix
 
-  package {['mercurial', 'vim', 'emacs']: ensure => present}
+  package {['mercurial', 'vim', 'emacs', 'debian-goodies']: ensure => present}
 
   file {'/etc/timezone':
     ensure => file,
     owner => root,
     group => root,
     mode => 0644,
     content => 'UTC',
     notify => Service['cron']
   }
 
   file {'/etc/localtime':
     ensure => link,
     target => '/usr/share/zoneinfo/UTC',
     notify => Service['cron']
   }
 
   service {'cron':
     ensure => running,
     enable => true,
   }
 
   class {'logrotate':
     stage => 'post'
   }
 }