[LTP] [PATCH] open04.c: convert to new LTP API

[Petr Vorel]

Hi Avinesh,

> I suggest to merge with these fixes:
...
> * use TST_EXP_FAIL() - the same result as TST_EXP_FAIL2() with shorter code
I'm sorry I was completely wrong, TST_EXP_FAIL2() is correct here (I forget it
is about >0 return value, not about parameters).

Kind regards,
Petr