Comment # 54 on bug 953522 from Ladislav Slez�k

Stefan, please test the above patch.

This is the first draft, it does not check for the new repositories and does
not safe the current repositories for later.

But it works for me, after manually uninstalling "virtualbox-guest-tools"
package from a VBox VM YaST preselects that package to install. (And does not
select the other recommended packages.)