Have to fetch users before getting groups and vice versa

[David Hewitt]

Tried to use oobs_groups_config_get_groups () to get the list of groups available on the system and no groups were returned.

Calling oobs_users_config_get_users () on its own also returns no users.

get_groups has to be called before get_users works and get_users has to be called before get_groups works.

I suspect this is because of line 306 in oobs-groupsconfig.c being the following:
oobs_object_ensure_update (oobs_users_config_get ());

Should that not be the following?
oobs_object_ensure_update (oobs_groups_config_get ());

Line 428 in oobs-usersconfig.c is the reversed version of the same line.