Fixes #3650, #11600 - Compute Resource availability_zones, flavors, security_groups API v2 endpoints

Fixes #10782 - global host status

• OK
• WARN
• ERROR

Plugins can add their own substatuses. These are automatically...

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...

Fixes #10731 - Allow matches to merge with default values

fixes #11175 - [API] Add taxonomies to ptables, display ptables in taxonomies

Fixes #10356 - changed the POST/PUT RABL template to be the same as the GET template

HTTP response code standardized to 201 on create.

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 #10854 - config_templates missing from show in taxonomies and os

Fixes #7096 - Adds STI to templates

This commit converts Ptables to be just another type of Template so it
gets the same features as ConfigTemplate. ConfigTemplate was renamed to
ProvisioningTemplate to reflect UI and the name under it's commonly known.