Add gating tests for RHEL 9

gating.yaml

@@ -0,0 +1,6 @@
+--- !Policy
+product_versions:
+  - rhel-9
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

tests/basic-test.sh

@@ -0,0 +1,6 @@
+#!/bin/bash -
+set -e
+set -x
+
+# Run nbdkit and check that nbdinfo can connect back to it.
+nbdkit -U - memory 1G --run 'nbdinfo "$uri"'

tests/tests.yml

@@ -0,0 +1,12 @@
+- hosts: localhost
+  roles:
+  - role: standard-test-basic
+    tags:
+    - classic
+    required_packages:
+    - libnbd
+    - nbdkit
+    tests:
+    - simple:
+        dir: .
+        run: ./basic-test.sh