fix reference to tenant id.

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