Cloned from launchpad blueprint https://blueprints.launchpad.net/cinder/+spec/non-customer-api-cleanup.

Description:

Currently, calls designed purely for nova use to talk to cinder (attach, detach, some snapshot status stuff, get encryption key) are mixed into the same extensions as APIs designed to be called by customer directly, meaning they have to be loaded on customer facing endpoints and calls individually disabled in policy. This is an error prone process, particularly as new calls aare added. 

This blueprint covers work to split them into their own extensions so that they do not have to be loaded on public facing endpoints.

Specification URL (additional information):

None