Fixed level part of patch

> This is very similar to the existing getseuser utility that likewise
> does a getseuserbyname() but then calls
> get_ordered_context_list_with_level() and displays all of the contexts
> in it.  Differences are that you permit specification of the role (and
> level, if fixed) via options and you only get the default value rather
> than the entire list.
I found this test program much easier to figure out what the application 
(locallogin, sshd ...) would do when I logged in.

Probably be worth while adding some of the mls constraints tests in 
also.  IE Make sure mls is working so if I have a process running s0:s0 
it can't generate a SystemHigh user, as well as a user with s0:s0 can 
not ask for a level of SystemHigh.