Regenerate initrd after configuring keyboard (bnc#888804)

* Some autotranslated code polishing (in a different commit for easier review)
* Update dependency on yast2 >= 3.1.94 (new messages)
OK, I think again about it and I think that it would be much nicer to not have options that you need to learn and it should simply return expectation. 
so something like
```
def expect_to_execute(command)
  expect(Yast::SCR).to(receive(:Execute).with(BASH_PATH, command))
end

# and usage in code
expect_to_execute("echo a").once.and_call_original
```

This way it is more nature for anyone who knows rspec and it is less magic and need less learning to understand what it do.

I am currently checking if it is possible to have own matcher for receive