RBAC tests for os-extended-status policies

This commit adds RBAC tests for os-extended-status
policies, the documentation for which can be found here:

https://github.com/openstack/nova/blob/master/nova/policies/extended_status.py

Tests for both APIs that enforce each policy were added.

Change-Id: I2eb9c7f62d8adbff77dd36f39c3030751d21a894
Implements: blueprint rbac-tests-for-compute-extended-status
Depends-On: I1c14646dc8d102cd093be09833c23846781e5e73
diff --git a/releasenotes/notes/rbac-tests-for-compute-extended-status-ef00256e58b66223.yaml b/releasenotes/notes/rbac-tests-for-compute-extended-status-ef00256e58b66223.yaml
new file mode 100644
index 0000000..6cf82e6
--- /dev/null
+++ b/releasenotes/notes/rbac-tests-for-compute-extended-status-ef00256e58b66223.yaml
@@ -0,0 +1,11 @@
+---
+features:
+  - |
+    Add RBAC tests for os_compute_api:os-extended-status, which validate that
+    the following attributes:
+
+        - OS-EXT-STS:task_state
+        - OS-EXT-STS:vm_state
+        - OS-EXT-STS:power_state
+
+    are present in the relevant response bodies.