[LTP] Rename tst_test_* to tst_require_*

[Cyril Hrubis]

Hi!
> If we use needs or require ? Hard question - when I search for synonyms
> from one or the other, I don't see a big different. Without looking on
> the impact, require sounds also more descriptive.

There is about thousand of uses of *NEEDS_FOO and *needs_foo in the new
library tests, so renaming to tst_needs_foo would be the least painful.

-- 
Cyril Hrubis
chrubis@suse.cz