fixes #11240 - Add api docs to hostgroup params

Fixes #11219 - rename config_template attributes in os_default_templates

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

Refs #3809 - Enable cop Style/AlignArray

refs #10550 - extract settings API error string

Fixes #10550 - Settings API will not update when value parameter is missing

Fixes #6854 - Api status allowed for all users

Fixes #8343 - Consolidated code paths, and removed unnecessary DB calls for parent object

Fixes #11078 - Substitute find_all_by by where to comply with Rails 4

This commit takes away all instances up to this point of find_all_by to
improve Rails 4 compatibility. They are substituted by .where calls.

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

HTTP response code standardized to 201 on create.