placement: Add GET /usages to placement API

This adds GET /usages as part of a new microversion 1.9 of the
placement API. Usages can be queried by project or project/user:

  GET /usages?project_id=<project id>
  GET /usages?project_id=<project id>&user_id=<user id>

and will be returned as a sum of usages, for example:

  200 OK
  Content-Type: application/json

  {
    "usages": {
      "VCPU": 2,
      "MEMORY_MB": 1024,
      "DISK_GB": 50,
      ...
    }
  }

A new method UsageList.get_all_by_project_user() has been added
for usage queries.

Part of blueprint placement-project-user

Change-Id: I8b948a4dfe6a50bea053b5dcae8f039229e2e364

1 files changed, 2 insertions, 2 deletions

diff --git a/nova/tests/functional/api/openstack/placement/gabbits/microversion.yaml b/nova/tests/functional/api/openstack/placement/gabbits/microversion.yaml
index 33cdd3338d..d721c9be67 100644
--- a/nova/tests/functional/api/openstack/placement/gabbits/microversion.yaml
+++ b/nova/tests/functional/api/openstack/placement/gabbits/microversion.yaml
@@ -39,13 +39,13 @@ tests:
   response_json_paths:
       $.errors[0].title: Not Acceptable
 
-- name: latest microversion is 1.8
+- name: latest microversion is 1.9
   GET: /
   request_headers:
       openstack-api-version: placement latest
   response_headers:
       vary: /OpenStack-API-Version/
-      openstack-api-version: placement 1.8
+      openstack-api-version: placement 1.9
 
 - name: other accept header bad version
   GET: /