fixes #11037 - Add ByIdName to environment model

Fixes #11089 - Adapt tests to Rails 4

This commit contains all changes to tests in branch
https://github.com/theforeman/foreman/pull/2055 that I found to be
retrocompatible with Rails 3. The more of these we can get in, the less
code we will have to review for Rails 4, and the more relevant it will...

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

HTTP response code standardized to 201 on create.

Refs #3809 - Remove cops for empty lines

Refs #3809 - Remove useless assignments

Refs #969 - Foreman-side changes for serving templates from the proxy

fixes #6856 - API v2 - more efficient import puppetclasses for single environment

fixes #5506 - added scoped search to SmartProxy for UI and API v2

Fixes #4851: a SmartProxy.with_features scope replaces feature-specific scopes generated during class loading

fixes #4314 - ignore default scope ordering on host search by puppet class

fixes #3553 - add "except" option to prevent puppet class import to select types of import

fixes #3011 - default root node name for api collections json response to :results but make it configurable

fixes #3017 - split APIv2 controllers from v1 parents