torture: test get/set compression ioctl permissions

torture: test get/set compression ioctl permissions

Windows Server 2012[r2] exhibits some strange behaviour with regard
to handling the compression fsctls.
[READ/WRITE]_ATTR permissions are not required for the corresponding
get/set compression ioctls. WRITE_DATA is required for set compression.

Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Nov 22 19:57:48 CET 2013 on sn-devel-104