Hypervisors collection_name affects pagination query

[Fan Zhang]

In nova, hypervisor view builder's collect_name is 'hypervisors':

```
# nova.api.openstack.compute.views.hypervisors.ViewBuilder
class ViewBuilder(common.ViewBuilder):
    _collection_name = "hypervisors"

    def get_links(self, request, hypervisors, detail=False):
        coll_name = (self._collection_name + '/detail' if detail else
                     self._collection_name)
        return self._get_collection_links(request, hypervisors, coll_name,
                                          'id')
```

So when we do paginated query via openstacksdk, we would get response like this:

```
{u'hypervisors': [{u'status': u'enabled', u'state': u'up', u'id': u'53fb5bdc-f9a4-4fc4-a4be-8eb33cd236b1', u'hypervisor_hostname': u'gd02-compute-11e115e64e19'}, {u'status': u'enabled', u'state': u'up', u'id': u'a4db6ea8-2a91-45e7-a4b4-cb26c2dbc514', u'hypervisor_hostname': u'gd02-compute-11e115e64e11'}, {u'status': u'enabled', u'state': u'up', u'id': u'd92c5452-ea75-4f58-8e0b-b4a6823850d8', u'hypervisor_hostname': u'gd02-compute-11e115e64e12'}], u'hypervisors_links': [{u'href': u'http://nova-api.cty.os:11010/v2.1/hypervisors?limit=3&marker=d92c5452-ea75-4f58-8e0b-b4a6823850d8', u'rel': u'next'}]}
```

And openstacksdk uses wrong hypervisors_links to query next page, and get error:

```
Traceback (most recent call last):
  File "p_hypervisors-admin.py", line 48, in <module>
    do_operation(limit, marker)
  File "p_hypervisors-admin.py", line 38, in do_operation
    srvs = [i for i in info]
  File "/usr/lib/python2.7/site-packages/openstack/resource.py", line 898, in list
    exceptions.raise_from_response(response)
  File "/usr/lib/python2.7/site-packages/openstack/exceptions.py", line 212, in raise_from_response
    http_status=http_status, request_id=request_id
openstack.exceptions.NotFoundException: NotFoundException: 404: Client Error for url: http://nova-api.cty.os:11010/v2.1/hypervisors?limit=3&marker=ea9d857a-6328-47a8-abde-dc38972f4ca2, Not Found
```

The right uri should be `/v2.1/os-hypervisors`

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/709431

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/train
Review: https://review.opendev.org/711664

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/stein
Review: https://review.opendev.org/711669

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/rocky
Review: https://review.opendev.org/711670

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/709431
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=b68033ecc9d38dcbe339c993338bdca691f73b33
Submitter: Zuul
Branch: master

commit b68033ecc9d38dcbe339c993338bdca691f73b33
Author: Fan Zhang <email address hidden>
Date: Mon Feb 24 16:49:35 2020 +0800

    Fix hypervisors paginted collection_name.

    Hypervisor view builder's _collection_name,
    'hypervisors' is used to build next link that
    sdk use as uri to do paginated query. But correct
    API should be `GET /v2.1/os-hypervisors?<params>`
    rather than `GET /v2.1/hypervisors?<params>`.

    This patch fixes this bug.

    Change-Id: Idc4f3fe54136a6bd3dbc7dc0efd3f62745991199
    Closes-Bug: 1864428
    Signed-off-by: Fan Zhang <email address hidden>

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/711664
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2f4e3ac3b018128b11a80ec343b333c3a6e4703f
Submitter: Zuul
Branch: stable/train

commit 2f4e3ac3b018128b11a80ec343b333c3a6e4703f
Author: Fan Zhang <email address hidden>
Date: Mon Feb 24 16:49:35 2020 +0800

    Fix hypervisors paginted collection_name.

    Hypervisor view builder's _collection_name,
    'hypervisors' is used to build next link that
    sdk use as uri to do paginated query. But correct
    API should be `GET /v2.1/os-hypervisors?<params>`
    rather than `GET /v2.1/hypervisors?<params>`.

    This patch fixes this bug.

    Change-Id: Idc4f3fe54136a6bd3dbc7dc0efd3f62745991199
    Closes-Bug: 1864428
    Signed-off-by: Fan Zhang <email address hidden>
    (cherry picked from commit b68033ecc9d38dcbe339c993338bdca691f73b33)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/711669
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=9030b8a56d46eeef3e2a0ee6e19c3b05a277c77c
Submitter: Zuul
Branch: stable/stein

commit 9030b8a56d46eeef3e2a0ee6e19c3b05a277c77c
Author: Fan Zhang <email address hidden>
Date: Mon Feb 24 16:49:35 2020 +0800

    Fix hypervisors paginted collection_name.

    Hypervisor view builder's _collection_name,
    'hypervisors' is used to build next link that
    sdk use as uri to do paginated query. But correct
    API should be `GET /v2.1/os-hypervisors?<params>`
    rather than `GET /v2.1/hypervisors?<params>`.

    This patch fixes this bug.

    Change-Id: Idc4f3fe54136a6bd3dbc7dc0efd3f62745991199
    Closes-Bug: 1864428
    Signed-off-by: Fan Zhang <email address hidden>
    (cherry picked from commit b68033ecc9d38dcbe339c993338bdca691f73b33)
    (cherry picked from commit 2f4e3ac3b018128b11a80ec343b333c3a6e4703f)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/711670
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=e50aecda86ecbd955aaab7e3b37f0d81836be579
Submitter: Zuul
Branch: stable/rocky

commit e50aecda86ecbd955aaab7e3b37f0d81836be579
Author: Fan Zhang <email address hidden>
Date: Mon Feb 24 16:49:35 2020 +0800

    Fix hypervisors paginted collection_name.

    Hypervisor view builder's _collection_name,
    'hypervisors' is used to build next link that
    sdk use as uri to do paginated query. But correct
    API should be `GET /v2.1/os-hypervisors?<params>`
    rather than `GET /v2.1/hypervisors?<params>`.

    This patch fixes this bug.

    Change-Id: Idc4f3fe54136a6bd3dbc7dc0efd3f62745991199
    Closes-Bug: 1864428
    Signed-off-by: Fan Zhang <email address hidden>
    (cherry picked from commit b68033ecc9d38dcbe339c993338bdca691f73b33)
    (cherry picked from commit 2f4e3ac3b018128b11a80ec343b333c3a6e4703f)
    (cherry picked from commit 9030b8a56d46eeef3e2a0ee6e19c3b05a277c77c)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova rocky-eol release.