s3: tests: smbclient test to ensure we can create and see a :foobar stream on the...

s3: tests: smbclient test to ensure we can create and see a :foobar stream on the top level directory in a share.

Regression test for:

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11522

Remember to remove the ARCHIVE attribute from the toplevel
share when done (can only be done over SMB2+).

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Fri Sep 18 11:00:44 CEST 2015 on sn-devel-104