Remove workflow example and limit revision history

blue-green-deploy/components/bg-guestbook.jsonnet

@@ -34,6 +34,7 @@ local params = std.extVar("__ksonnet/params").components["bg-guestbook"];
       },
       "spec": {
          "replicas": params.replicas,
+         "revisionHistoryLimit": 3,
          "selector": {
             "matchLabels": {
                "app": params.name