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)
for example of quite nice ( well it is my code, so maybe I am blind to my mistakes :) ) structure of testing aspect of method see https://github.com/yast/yast-installation/blob/master/test/cio_ignore_test.rb#L135 there is 3 actions which is done and also 3 error statements if something failed.