YCP Killer: Apply changes needed for Ruby translation

This module needed few changes before it was possible to translate its
YCP files into Ruby. This commit performs them.

The commit is a result of running YCP Killer's "patch" command. The
history of the applied patch is available here:

  https://github.com/yast/ycp-killer/commits/master/patches/dbus-server.patch

See also:

  https://github.com/yast/ycp-killer
YCP Killer: Translate YCP files into Ruby

The commit is a result of running YCP Killer's "ruby" command.

See also:

  https://github.com/yast/ycp-killer