[LTP] [PATCH 2/2] tst_test.sh: Add public tst_test_root command

[Joerg Vehlow]

Hi,
> Can we keep the name to be tst_require_root() please?
>
> Historically this function has been always named like this in LTP.
>
Not a very good argument for two reasons:
1. The function was internal to the library, so no one (except for 
library developers)
    should know about it anyway. The old public interface 
(TST_NEEDS_ROOT) is unchanged
2. I wanted to make it consistent with other functions, that do similar 
stuff like
    tst_test_drivers and tst_test_cmds. Both also call tst_brk in case 
of unsuccessful tests.

Jörg