Add management endpoint

[licarth]

This endpoint will be disabled by default to prevent security holes in existing use cases.

The goal of this endpoint is to be able to manipulate profiles (and zoapp users behind that) :
- route.add("POST", "/profiles", ["open"], management.createProfile);
- route.add("GET", "/profiles", ["open"], management.listProfiles);
- route.add("GET", "/profiles/:profileId", ["open"], management.getProfile);
- route.add("PUT", "/profiles/:userId", ["open"], management.updateProfile);
- route.add("DELETE", "/profiles/:userId", ["open"], management.deleteProfile);

This endpoint is not meant to be exposed publicly, but restricted on the network layer (by Kubernetes ingress rules for instance).