zhufl bf0a685c28 services api ref: fix field enum value and add missing field ...

I62072573624c9e579a61affed6a7f8d57a6fdb6d tries to add schema
validation for volume services, and there are some inconsistencies
in the api ref doc.

https://developer.openstack.org/api-ref/block-storage/v3/#list-all-cinder-services
1. As Response Example shows, status takes the value of enabled
   or disabled, not available/unavailable.
2. response may contain backend_state field which is optional.

Change-Id: I2435e3dc7c704de158b479d2ea543409b7686a07

2018-09-20 08:51:05 +08:00

..

source

services api ref: fix field enum value and add missing field

2018-09-20 08:51:05 +08:00