List hypervisors with details rbac test

As mentioned in a previous patch [0],
a test can be added for listing hypervisors
with details, which is what this patch does.

[0] https://review.openstack.org/#/c/462742/3/patrole_tempest_plugin/tests/api/compute/test_hypervisor_rbac.py

Change-Id: Ib828c707604b57747e9e54800455831d12155138
2 files changed