Volume services rbac test

Adds an RBAC test for the volume services API. This covers
the cinder policy action "volume_extension:services:index".

Change-Id: I8d12de532087b52bd113c052bfa173f6041e9e1d
diff --git a/releasenotes/notes/volume-services-rbac-test-57e69f9952c8746e.yaml b/releasenotes/notes/volume-services-rbac-test-57e69f9952c8746e.yaml
new file mode 100644
index 0000000..5b6f0cd
--- /dev/null
+++ b/releasenotes/notes/volume-services-rbac-test-57e69f9952c8746e.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Added RBAC test for the volume services API, which covers the following
+    policy action: "volume_extension:services:index".