Remove system scope token usage

Octavia supports the system scope and now we are enabling the new defaults
by default that raise an error when system scoped tokens are used.

To enable the new defaults, we need to remove the usage of system
scope token from tests otherwise they fail.

- https://review.opendev.org/c/openstack/octavia/+/925625

Depends-On: https://review.opendev.org/c/openstack/octavia/+/929580
Change-Id: I1bf193807eb254507626b4e7f2bb071ba46d7290
diff --git a/releasenotes/notes/Make-keystone-default-roles-tests-default-a65a62864b93a296.yaml b/releasenotes/notes/Make-keystone-default-roles-tests-default-a65a62864b93a296.yaml
new file mode 100644
index 0000000..d38181a
--- /dev/null
+++ b/releasenotes/notes/Make-keystone-default-roles-tests-default-a65a62864b93a296.yaml
@@ -0,0 +1,8 @@
+---
+upgrade:
+  - |
+    The default tempest tests will now expect the keystone default roles RBAC
+    enabled. The legacy behavior can be enabled by setting
+    "RBAC_test_type: advanced" in the [load_balancer] section of your
+    tempest.conf. This change also removes the ability to test system scoped
+    tokens with Octavia.