Add tests list the availability zone

* Admin user is allowed to both list and list detail
* Regular user is allowed to get list
* Regular user is not allowed to get list detail

Partially Implements: blueprint missing-tempest-tests

Change-Id: I9d23c6677dcf4f4ba57e90097baeca374031604d
(cherry picked from commit a527891ee107c514775117c43ac8a809619a2f43)