Fixes #9591 - Added support for "inherit" state.

Refs #3809 - Enable cop Style/IfUnlessModifier

Fixes #11035 - template preview feature

Fixes #10915 - Deleting a host removes all host specific overrides

Fixes #10635 - Formalize deprecation warning

Fixes #10607 - match bonds based on identifier only

Fixes #10888 - skip attached_to updates if identifier was blank

Fixes #10633 - Associate architechture to OS during fact import

fixes #10861 - Remove unused columns from the hosts table

• Serial - Never really used, probably can be refactored as kernel
  parameters.
• last_freshcheck, source_file_id - left overs from puppet old store
  configs compatibility that we no longer use, I assume no one is using...

fixes #10627 - apply host taxonomy scope to facts/report joins

Previous changes to perform a join onto hosts with authorisation result
in a query such as Report.joins(:hosts), which ignores any
default_scope on Host::Base. This commit explicitly passes taxonomy...