Extend integ test readme (#23356)
Extend integ test readme (#23356)

* Extend integ test readme

For some reason the commands on docker.com are not sufficient in some
machines

* Fix command
istio/istio,istio/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio