Support Openshift Origin about linkerd2

[briansmith]

origin is k8s enterprise version, we should support it.

What doesn't work currently?

[xiaods]

use cluster-admin to run
conduit install | oc apply -f -

when it done. i run conduit dashboard, it open the browser, it report wrong:

| http://127.0.0.1:8001/api/v1/namespaces/conduit/services/web:http/proxy/

{
  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {},
  "status": "Failure",
  "message": "no endpoints available for service \"web\"",
  "reason": "ServiceUnavailable",
  "code": 503
}

[xiaods]

sorry, it blocks by china GFW for gcr.io images