dsdb: Ensure to sort replPropertyMetaData as UNSIGNED, not SIGNED quantities

dsdb: Ensure to sort replPropertyMetaData as UNSIGNED, not SIGNED quantities

enum is an int, and therefore signed.  Some attributes have the high bit set.

Andrew Bartlett

Change-Id: I39a5499b7c6bbb763e15977d802cda8c69b94618
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-on: https://gerrit.samba.org/163
Reviewed-by: Kamen Mazdrashki <kamenim@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Mar 14 10:16:41 CET 2014 on sn-devel-104

(cherry picked from commit 61b978872fe86906611f64430b2608f5e7ea7ad8)