selftest: Add tests for expected behaviour on directories as well as files

selftest: Add tests for expected behaviour on directories as well as files

This is important because it covers the codepath which had the talloc
error fixed by commit 60cf4cb5a630506747431ecbf00d890509baf2f3
(vfs_acl_common: In add_directory_inheritable_components allocate on
psd as parent)

Andrew Bartlett

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jelmer Vernooij <jelmer@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Sun Nov 11 15:48:10 CET 2012 on sn-devel-104