Increase RBAC test coverage for floating ips bulk API

This PS adds better RBAC test coverage for Nova
os-floating-ip-pools API, the documentation for which is here: [0].
The same policy is enforced for each endpoint: [1]. The
max_microversion is 2.35 since the API is deprecated in 2.36
onward [2]. Only [3] is not tested because there is no
corresponding Tempest endpoint in its client.

[0] https://developer.openstack.org/api-ref/compute/#floating-ips-bulk-os-floating-ips-bulk-deprecated
[1] https://github.com/openstack/nova/blob/master/nova/policies/floating_ips_bulk.py
[2] https://developer.openstack.org/api-ref/compute/#list-floating-ips
[3] https://developer.openstack.org/api-ref/compute/#list-floating-ips-by-host

Change-Id: Ie28ee0b4e76e59b9813bf352f03c0cf14fa91616
1 file changed