fixes #2250 API v2 add/remove puppetclasses from hosts and hostgroups

fixes #2299 - Parameters Controller (API v2) can reset parameters (delete them all)

Ensures that unused API v2 routes are not added when using nested routes

refs #1988 and refs #2239

fixes #1988 - CRUD Actions for nested parameters for host, domain, hostgroup, os

e.g.

GET /api/domains/6/parameters
POST /api/hosts/6/parameters
PUT /api/hostgroups/6/parameters/100
DELETE /api/operatingsystems/6/parameters/100

fixes #2239 API v2 CRUD for locations and organizations and added nested loc/org

Fix home mapping in API v2

Home controller is in v1, mapping all the routes from scope for v1
except the final fallback, that needs to go to the end of routes file.

Oterwise status is not working for V2.

v2 api for configuration_templates and template_combinations

added API v2 placeholders.

fixes #1890 api host status

fixes #2037 remove catchall routes

this blocks any plugin/engine from adding additional routes