Fixes #17680 - templates_used host helper

templates_used contains the names of all of the provisioning templates
kickstart used during a host build. This allows users to be able to
show the name of a provisioning template during PXEBoot, for example

Fixes #16740 - Access host params through macro

Fixes #17886 - move config groups under parameters

fixes #17853 - resolve ips in interface scope

fixes #16792 - don't modify AR record attributes in-place

Rails 5 may call #freeze on strings passed in as an attribute during
validation, so attributes must not be edited in-place with gsub! and
similar methods.

Fixes #17257 - Allow specific configs to be recreated

fixes #15610 - choose firmware for vsphere vms

Fixes #6006 - Add options to disable updates from facts

Add option ignore_facts_for_operatingsystem:
    do not update system's operating system based on facts
  Add option ignore_facts_for_domain:
    do not update system's domain based on facts

fixes #17095 - ensure subnet belongs to ip from facts

Fixes #16987 - Added ability to apply facet attributes