sysdb: move add_ulong() convenience to sysdb.c
Considering that sysdb.c is about utilities around our cache and that
sysdb_ops.c is about operations on objects, seems that add_ulong()
could fit better in sysdb.c.
This move is a suggestion from Jakub Hrozek.
Related: https://fedorahosted.org/sssd/ticket/1656
Signed-off-by: Fabiano FidĂȘncio <fabiano@fidencio.org>
Reviewed-by: Petr Cech <pcech@redhat.com>