Update to anaconda-34.25.1.8
    
    - bootloader: do not consider non-ibft iscsi disk as usable for bootloader (rvykydal)
      Resolves: rhbz#2003519
    - Fix kickstart command order in new version (vslavik)
      Resolves: rhbz#2100463
    - TUI software spoke is ready with failing repos, too (vslavik)
      Resolves: rhbz#2020299