fixes #3017 - split APIv2 controllers from v1 parents

fixes #3312 - support /users/extlogin as a login page based on REMOTE_USER

i18n - extracting new, updating rails, pulling from tx

Fixes #3569, #3210 - Use port from foreman_url for templates

fixes #3587, #2855 - print an error on invalid json vs 500 error

fixes #3581 - link to reports search for failed hosts should use "host = foo.example"

fixes #3578 - minor SQL and whitespaces updates to the smart proxy class

fixes #3566 - exposes orchestration tasks via the API at /api/orchestration/id/tasks

fixes #3577 - do not treat `params[:dryrun]` with value `false` as true

fixes #3338 - grey out VM form when editing is not supported