test resources: empty directories are ignored

[Martin Vysny <mv...@whitestein.com>]

Hi,
  I have several directories located in the src/test/resources and I
need them to be copied to target/test-classes. This is of course handled
by maven-resources-plugin, however it does not copy empty directories. I
know it sounds insane to access empty dirs using classloader but I have
my reasons ;)

Thanks in advance,
Martin Vysny