Update to anaconda-34.25.2.7
    
    - Show an error message when subscription token transfer fails (mkolman)
      Resolves: rhbz#2057472
    - Bump blivet version for NVMe-oF support (vslavik)
      Resolves: rhbz#2164343
    - Make text in custom_storage_helper more accurate (ozobal)
      Resolves: rhbz#2133046
    - Fix infobar colors in GTK GUI (ozobal)
      Resolves: rhbz#2074827