add option for managing pam.d/sudo file

manifests/sudo.pp

-class su_debuild::sudo {
+class su_debuild::sudo (
+  Boolean $manage_pamd_sudo = false,
+)
+{
 
   ### SUDO ###
   ensure_packages(['sudo'], {'ensure' => 'present'})
@@ -14,12 +17,14 @@ class su_debuild::sudo {
     source => 'puppet:///modules/su_debuild/etc/filter-syslog/pbuilder';
   }
 
-  # To be able to run cowbuilder in AFS, we need to use a special version of
-  # /etc/pam.d/sudo.
-  file {
-    '/etc/pam.d/sudo':
-      source  => 'puppet:///modules/su_debuild/etc/pam.d/sudo',
-      require => Package['sudo'];
+  if ($manage_pamd_sudo) {
+    # To be able to run cowbuilder in AFS, we need to use a special version of
+    # /etc/pam.d/sudo.
+    file {
+      '/etc/pam.d/sudo':
+        source  => 'puppet:///modules/su_debuild/etc/pam.d/sudo',
+        require => Package['sudo'];
+    }
   }
 
 }