Stop puppet from annihilating our license files

manifests/install.pp

@@ -124,7 +124,7 @@ class matlab::install(      # $namevar matlab release version
   file { "${install_destination}/licenses/":
     ensure  => directory,    # make sure this is a directory
     recurse => true,    # recursively manage directory
-    purge   => true,      # purge all unmanaged files
+    purge   => false,      # purge all unmanaged files
     force   => true,      # also purge subdirs and links
     owner   => root,
     group   => root,