fix reference to tenant id.

Administrator can create resource, even if the tenant of resource is
different from the one of authentication. For example, administrator
can operate 'quantum net-create' command with different tenant
between the authentication tenant(--os-tenant-name) and --tenant-id.

In this case, quota cannot be restricted with the resource tenant,
because it is restricted with --os-tenant-name.

This patch fixes this problem.

Fixes: bug #1179729

Change-Id: I8ce893bb583d52f81c661082372d725bebf9c1be
Merge "fix reference to tenant id."