Updated openstack/openstack
Project: openstack/nova  c6d0139341918d897f5b47a8aa3f0e857226dc99

Add API schema for v2.1 "update a server" API

Some v2.1 APIs(create/update/rebuild server) contains the API
extension feature, it searches extension methods with its method
name and operates them automatically.
It is necessary to change the API schemas also automatically based
on the API extension loading condition, because the API extensions
add API parameters.

This patch adds API schema extensions which are implemented with the
same mechanism (stevedore library) as the API extension for "update
a server" extensions.

Partially implements blueprint v3-api-schema

Change-Id: I2f80a994bc69153bd40251827aad0479876a94ab