Add a serial e2e test

Author: hongkailiu

.openshift-tests-extension/openshift_payload_cluster-version-operator.json

@@ -9,6 +9,16 @@
     "lifecycle": "blocking",
     "environmentSelector": {}
   },
+  {
+    "name": "[Jira:\"Cluster Version Operator\"] cluster-version-operator-tests should support passing serial tests [Serial]",
+    "labels": {},
+    "resources": {
+      "isolation": {}
+    },
+    "source": "openshift:payload:cluster-version-operator",
+    "lifecycle": "blocking",
+    "environmentSelector": {}
+  },
   {
     "name": "[Jira:\"Cluster Version Operator\"] cluster-version-operator-tests can use oc to get the version information",
     "labels": {},

test/cvo/cvo.go

@@ -15,6 +15,10 @@ var _ = g.Describe(`[Jira:"Cluster Version Operator"] cluster-version-operator-t
 		o.Expect(true).To(o.BeTrue())
 	})
 
+	g.It("should support passing serial tests [Serial]", func() {
+		o.Expect(true).To(o.BeTrue())
+	})
+
 	g.It("can use oc to get the version information", func() {
 		ocClient, err := oc.NewOC(logger)
 		o.Expect(err).NotTo(o.HaveOccurred())