knative
Automatically set logUrl template when openshfit-logging is installed.
Serving API exposes logUrl in Revision's Status. logUrl can launch visualization app to render logs specific to a Revision. However, logging.revision-url-template must be updated in config-observability (kubectl edit cm config-observability -n knative-serving) before the URL is usable An un-usable URL is shown below.
`host serving-operator]$ k get revision helloworld-8xpcn -n default -o jsonpath='{.status.logUrl}'
http://localhost:8001/api/v1/namespaces/knative-monitoring/services/kibana-logging/proxy/app/kibana#/discover?_a=(query:(match:(kubernetes.labels.knative-dev%2FrevisionUID:(query:'8e104620-b6b6-11e9-bf4f-0aae0e47085c',ty`
When openshift-logging is installed. Kibana hostname is available in openshift route. We should use the host info available and update logURL automatically to improve user experience.
