winbindd: return trust parameters when listing trusts

winbindd: return trust parameters when listing trusts

When asking a child domain process to list trusts on that domain,
return (along with trust domain names and SID) the trust properties -
flags, type, and attributes.

Use those attributes to initialize domain object.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11691

Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Tue Feb 23 22:02:16 CET 2016 on sn-devel-144