[LTP] Commands test cases

[Sebastian Chlad]

I would like to check with the LTP community if removing all "commands"
test cases could be an option.

Test cases testing commands are often outdated or not maintained as there
seems to be little intrest in them. Those test cases don't fit in with
the LTP project as it is now, where more emphasiz is put on kernel, security
and network testing.

If we have not objections among LTP upstream community I would suggest
removing whole commands section.