Support to show all quota usage at project level with admin role

Registered by Henry

Implement an api similar to the way we did for instances summary(/v2/​{tenant_id}​/servers/detail?all_tenant=True) which is use a "all_tenants" parameter to return the summary list we want.
The api may like:
Request: GET /v2/{tenant_id}/limits/detail?all_tenants=True

Note: it should support to show quota and its usage at project level.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Henry
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

Related branches

Sprints

Whiteboard

Gerrit topic: https://review.openstack.org/#q,topic:bug/1410003,n,z

Addressed by: https://review.openstack.org/168644
    support getting quote usage for all tenants

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Work Items

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