templates - sync from community-templates

fixes #3906 - Support for Junos ZTP

fixes #3752 - move data population from migrations into seed script

fixes #2572 - FreeBSD unattended installation support via mfsbsd

fixes #3737 - added PXEGrub specific PXE localboot template

refs #2792 - Adding comments to pxe templates

syncing with upstream community-templates

fixes #2837 add an interface to add repositories to kickstart, cleanup similar methods

fixes #2710 - removed a superfluous os name check that was tripping up safemode.

Fixes #2038 - updated config and partition table templates using ones from the community repository