Every so often, Debian push a point-release (last one was 8.7, 2017-01-14).

Then, I need to re-do this:

• Associate all preseed templates to this new OS (Preseed default, Preseed default finish, Preseed default iPXE, Preseed default PXEGrub2, Preseed default PXELinux, Preseed default user data; and their Community counterpart)
• Associate this OS to the same provisioning templates as the previous version
• Associate this OS to the same media as the previous version
• Associate the host group that we use for provisioning with this new OS
• Walk thru all hosts using this host group and updating the OS tab.

I propose the following:

• When an OS is created automaticaly from a fact :
  • Find the previous version (with same name, last <= major.minor
  • Do the association above (except maybe the host group which is a bit specific)