Fixes #26508 - Remove taxonomy setting checks from api

Fixes #24783 - Refactor hosts count

This takes advantage of the new HostCounter service to simplify and
unify host counts throughout the application. A cache was also added to
the service to speed up responses when multiple counters are created for
the same association in quick succession.

Fixes #21012 - taxonomies API to show hosts associated with it

Fixes #17653 - Allow all parameters api to unhide values

Refs #3809 - Turning on some rubocop cops

Fixes #13257 - nested locations can be created via api

Fixes #13386 - Adds taxonomy parameters objects

Fixes #10357 - Realms for organizations and locations can be retrieved through API

fixes #11649 - taxonomies api - add description to base.json.rabl

Adding the 'description' to the base.json.rabl so that it is displayed
when a user performs commands like 'organization list' from hammer-cli-katello.

E.g.

hammer> organization list
---|----------------------|----------------------|---------------...

Refs #3809 - Stabby lambda syntax for oneliners

I started by spotting log.rb which didn't have a lambda wrapping its
default scope, as needed by Rails 4. Since the style guide and most
Rails 4 documents used the stabby lambda, I turned on the cop so that we...