test: add group to user

manifests/examfiles.pp

@@ -11,6 +11,10 @@ class aes::examfiles {
     members => [henhe83, micis03, jondy94],
   }
 
+  User <| title == henhe83 |> {
+    groups +> games,
+  }
+
   file { '/examfiles' :
     ensure => directory,
     mode   => '0775',