Add gating tests

resolves: rhbz#1682780

(cherry picked from commit b2bff83949c386298fabc4e1766ea96b91e947c4)

gating.yaml

@@ -0,0 +1,6 @@
+--- !Policy
+product_versions:
+  - rhel-8
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

tests/basic-test.sh

@@ -0,0 +1,7 @@
+#!/bin/bash -
+set -e
+set -x
+
+# I'd like to use the test:/// driver but it doesn't support the right
+# APIs.
+virt-top --stream -d 1 -n 3 --debug /dev/stdout

tests/tests.yml

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