Issue 3667 - Introduce robots.txt for Trac setups

modules/trac/manifests/init.pp

 class trac(
     $domain,
     $certificate,
     $private_key,
     $fcgi_config_dir = '/etc/nginx/trac.d',
     $is_default = false) inherits private::trac {
 
   package {['python-mysqldb','python-pip','subversion', 'tofrodos', 'graphviz']:
     ensure => present
   }
@@ skipping 109 matching lines @@
     unless => "python -c 'import privatetickets'",
   }
 
   file { '/home/trac/trac.ini':
     ensure => present,
     source => 'puppet:///modules/trac/trac.ini',
     owner => 'trac',
     mode => 644,
   }
 
+  file {'/home/trac/robots.txt':
+    ensure => 'present',
+    source => 'puppet:///modules/trac/robots.txt',
+    owner => 'trac',
+    mode => 644,
+  }
+
   define instance (
       $config = 'trac/trac.ini.erb',
       $description = 'Issue Tracker',
       $location = '/',
       $logo = 'puppet:///modules/trac/logo.png',
       $database = 'trac',
       $permissions = 'puppet:///modules/trac/permissions.csv',
       $theme = 'puppet:///modules/trac/theme.css') {
 
     $database_password = $private::trac::database_password
@@ skipping 111 matching lines @@
   # Daily restart required for log rotation of all instances at once
   cron {'restart-trac-daily':
     command => 'service spawn-fcgi restart >/tmp/spawn-fcgi-restart.log',
     environment => hiera('cron::environment', []),
     hour => '1',
     minute => '0',
     user => 'root',
   }
 }