Write cio_ignore kernel arguments always

[teclator]

Problem

When installing an s390x machine it is not writing the cio_ignore kernel command line parameter which is given through the parmfile.

• https://trello.com/c/LF2woKmG/3484-2-alp-p3-1210525-alpagamas390x-cioignore-parameters-from-the-installation-are-not-transferred-to-the-installed-system
• https://bugzilla.suse.com/show_bug.cgi?id=1210525

Solution

In zVM machines it does not write the cio_settings at all because it was requested (fate#317861), but as the bug already reports, if the cio_ignore parameter is given through the parmfile we should kept it as it was given and if not we should call cio_ignore -k to obtain the kernel command line arguments to be used.

It depends in a change in the kernel because it was using the /etc/install.inf file for checking if there is some cmdline argument which is wrong in agama because there is no linuxrc at all.

And looks like the Bootloader kernel arguments are not read when the configuration is proposed at all mainly because the parameter is not whitelisted (so, it also depends on yast/yast-bootloader#693)

Testing

• Tested manually

[coveralls]

coverage: 41.058% (-0.006%) from 41.064%
when pulling 8ff0f2e on cio_ignore_always
into 25e6ff5 on master.

[yast-bot]

✔️ Internal Jenkins job #152 successfully finished
✔️ Created OBS submit request #1141535