Verify delete quota response of V2/V3 APIs

This patch adds the JSON schema for response status of Nova quota delete APIs
to block the backward incompatibility change in the future.

delete quota does not return the response body.
Response status of above APIs is below:
V2: 202
V3: 204

Partially implements blueprint nova-api-attribute-test

Change-Id: I3113e3a07937bd7cb44a19e5ef4a5fb880ce3721
Merge "Verify delete quota response of V2/V3 APIs"