Fixes #7830 - interfaces api output is class specific

- per type rabl templates
- fixed api docs for interfaces

fixes #7898 - ensure that format can respond to json / yaml

fixes #4439 - ensure user logins are handled case insensitively

Fixes #7933 - OS api responses miss field title

fixes #7372 - API v2 - accept PUT/POST requests with wrapped root node to add/remove has_many associations of child nodes

Fixes #7934 - Set correct order of require_dependency

fixes #7584 - add Authorizable module to class AuthSource

fixes #3492 - API v2 nested routes for each controller

fixes #7332 - Host Create API documentation missing required parameters

Fixes #2283 , #3135 - add config option for proxy_request_timeout