[LTP] lib: Rename function check_kver() => check_min_kver()

[Andrea Cervesato]

Hi Petr,

> @Cyril @Andrea could you also please double check?

It's correct.

The legacy ETXTBSY behavior was fully restored in commit
3b832035387f (Revert "fs: don't block i_writecount during exec").

So we have a window where this is not valid anymore and we should
take this in consideration inside the test.

Regards,
--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com