Ensure new kernel is default in zipl.conf on upgrade installs (#683891)
    
    Rather than writing out the entry name as just 'linux', attach the
    kernel version so there is some description for the user at boot time.
    Keep the order the same as we have in previous releases, but ensure the
    most recent kernel is the default boot selection.
    
    (cherry picked from commit 9d9f3142813c83eaf2afe71cdee44a1bc52afa81)