Added new notification servers

modules/notificationserver/manifests/init.pp

 class notificationserver {
   class {'nginx':
     worker_processes => 2,
     worker_connections => 4000,
     ssl_session_cache => off,
   }
 
   class {'statsclient':
     log_path => '/var/log/nginx/access_log_notification.1.gz',
     custom_sitescriptsini_source => 'puppet:///modules/notificationserver/sitescripts.ini'
   }
 
   file {'/var/www':
     ensure => directory,
     owner => nginx,
     mode => 0755,
     require => Package['nginx']
   }
 
   file {'/var/www/notification':
     ensure => directory,
     owner => nginx,
     mode => 0755,
     require => Package['nginx']
   }
 
   exec { "fetch_notifications":
     command => "hg clone --noupdate https://hg.adblockplus.org/notifications /opt/notifications && chown -R nginx /opt/notifications",
     path => ["/usr/bin/", "/bin/"],
-    require => Package['mercurial'],
+    require => [
+      Package['mercurial'],
+      Package['nginx'],
+    ],
     onlyif => "test ! -d /opt/notifications"
   }
 
   cron {"update_notifications":
     ensure => present,
     command => "python -m sitescripts.management.bin.generateNotifications",
     environment => ['MAILTO=admins@adblockplus.org,root', 'PYTHONPATH=/opt/sitescripts'],
     user => nginx,
     minute => '*/10',
     require => [
@@ skipping 29 matching lines @@
     enabled => true
   }
 
   file {'/etc/logrotate.d/nginx_notification.adblockplus.org':
     ensure => file,
     mode => 0444,
     require => Nginx::Hostconfig['notification.adblockplus.org'],
     source => 'puppet:///modules/notificationserver/logrotate'
   }
 }