Update cobbler to rev 55 via SR 812949
    
    https://build.opensuse.org/request/show/812949
    by user trenn + dimstar_suse
    - Bring changelog in sync with Uyuni:
    - Fixes template engine selection(bsc#1170462)
      Fixed mainline by commit 33c769e99
    D fix-template-engine-selection.patch
    - Fixes a template rendering error (bsc#1169779)
      Fixed mainline by commit 5e5ef6c8c
    D fixes-a-template-rendering-error.patch
    
    - use systemctl to restart cobblerd on logfile rotation (bsc#1169207)
      Mainline logrotate conf file uses already /sbin/service instead of
      outdated: /etc/init.d/cobblerd
    - Fix cobbler sync for DHCP or DNS (bsc#1169553)
      Fixed mainline by commit 2d6cfe42da
      D fix_cobbler_sync_for_dhcp_or_dns.diff
    - Signatures file now uses "default_autoinstall" which fixes import
      problem happening with some distributions (bsc#1159010)
      Fixed mainline by commit 33d181199f0da1da
    
    - Fix for kernel and initrd detection