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

[Joerg Vehlow]

>> @Jan @Peter what do you think?
> We already did rename once (0567a8958 shell: Rename
> s/tst_check_cmds/tst_test_cmds/), but even if we didn't;
> I'm for renaming tst_test_* to tst_require_* - clear names are important
> (consistency with names as well).
That's two (and me) in favor of renaming tst_test_.
I will submit a patch for it.