Fix v3 hypervisor extension servers action follow REST principles

The orignial hypervisor servers action as below:
'/os-hypervisors/[filters]/servers'

Change it as:
'/os-hypervisors/[hypervisor id]/servers'
And tt will return all the servers on the specific hypervisor.

Partially implements: bp v3-api-extension-versioning

DocImpact

Change-Id: I6c252372af67eda79f670199deb6592c02603c33
Correct status code and response for quota_sets API v3

* Modify the response of update quota include 'id' that is same
with show quota.
* Change the status code of delete to 204.
* The request body of update have needn't 'tenant_id' and 'id', so remove them
from NON_QUOTA_KEYS.

Partially implements bp v3-api-extension-versioning

Change-Id: Id5bb149a911fa992a5cd374a3666ebfa976ec2c3
Merge "Fix v3 hypervisor extension servers action follow REST principles"
Merge "Correct status code and response for quota_sets API v3"