ldb_debug: Fix binary data in debug log

ldb_debug: Fix binary data in debug log

When duplicate objects were added, the GUID was printed in the debug log
The GUID was not escaped and therefore displayed as binary content.

This patch splits out the duplicate DN creation error and the duplicate
GIUD error.  Duplicate DN's are a normal event and don't require debug
logging.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13185

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
(cherry picked from commit c5a14306c82f702f4788faea262c9ec6ade584cb)