torture/ioctl: test set_compression(format_none)

torture/ioctl: test set_compression(format_none)

This test case was overlooked in the previous bso#12144 update -
set compression requests with format=COMPRESSION_FORMAT_NONE should
succeed if the server / backing storage doesn't offer compression
support.
Confirm that Samba matches Windows Server 2016 ReFS behaviour here.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=12144

Reported-by: Nick Barrett <nick@barrett.org.nz>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 6fde123176409e261d955e24b3d28e5124f33bed)

Autobuild-User(v4-6-test): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(v4-6-test): Fri Sep 22 13:36:22 CEST 2017 on sn-devel-144