Issue 123 - Integrate downloadserver cron::environment with Hiera

modules/downloadserver/manifests/init.pp

 class downloadserver(
     $domain,
     $certificate,
     $private_key,
     $is_default = false
   ) {
 
   class {'nginx':
     worker_connections => 4000,
     ssl_session_cache => off,
@@ skipping 57 matching lines @@
 
   file {'/etc/nginx/conf.d/adblockbrowserupdatescache.conf':
     source => 'puppet:///modules/downloadserver/adblockbrowserupdatescache.conf',
     require => Package['nginx'],
     notify => Service['nginx']
   }
 
   cron {'mirror':
     ensure => present,
     command => 'hg pull -q -u -R /var/www/downloads/',
-    environment => ['MAILTO=admins@adblockplus.org,root'],
+    environment => hiera('cron::environment', []),
     user => hg,
     minute => '*/10'
   }
 
   file {'/var/www/devbuilds':
     ensure => directory,
     owner => rsync
   }
 
   user {'rsync':
@@ skipping 29 matching lines @@
     mode => 0400,
     source => 'puppet:///modules/private/rsync@downloads.adblockplus.org.pub'
   }
 
   cron {'mirror-devbuilds':
     ensure => present,
     require => [File['/home/rsync/.ssh/known_hosts'],
                 File['/home/rsync/.ssh/id_rsa'],
                 File['/var/www/devbuilds']],
     command => 'rsync -e ssh -ltprz --delete devbuilds@ssh.adblockplus.org:. /var/www/devbuilds',
-    environment => ['MAILTO=admins@adblockplus.org,root'],
+    environment => hiera('cron::environment', []),
     user => rsync,
     hour => '*',
     minute => '4-54/10'
   }
 }