Plugins » Docker

Fixes #10029 - Docker registry API

Fixes #7874 - Docker Containers API

Routes are namespaced, code still needs to be namespaced

Add docker RABL to API

Without this template, compute_resources/main.json.rabl will look for a
docker.json template with no avail. This results in failed
api/compute_resources index and show calls (for Docker CRs).