Issue 3818 - Replace custom stages with stdlib equivalent

modules/base/manifests/init.pp

 class base ($zone='adblockplus.org') {
-  stage {'pre': before => Stage['main']}
-  stage {'post': require => Stage['main']}
 
-  class {'users':
-    stage => 'pre',
-  }
-
-  include postfix, ssh
+  include postfix, ssh, stdlib
 
   package {['mercurial', 'vim', 'emacs', 'debian-goodies', 'htop']:
     ensure => present,
   }
 
   service {'cron':
     ensure => running,
     enable => true,
   }
 
+  class {'users':
+    stage => 'setup',
+  }
+
   class {'logrotate':
-    stage => 'post'
+    stage => 'runtime',
   }
 
   $servers = hiera('servers')
   create_resources(base::explicit_host_record, $servers)
 
   define explicit_host_record(
     $ip,
     $ssh_public_key = undef,
     $role           = undef,
     $dns            = undef,
@@ skipping 24 matching lines @@
       public_key => $public_key,
     }
 
     # Implicit realization behavior has been introduced by accident in a
     # previous version, hence it should be kept until class base is obsolete
     # and the obsolete records have been removed
     realize(Host[$title])
     realize(Sshkey[$title])
   }
 }