As part of the continuation of splitting OpenShift up to make it be able to run on top of kubernetes, we just merged https://github.com/openshift/origin/pull/20344 which removes "openshift start node" and the "openshift start" commands. This means that the openshift binary will no longer include the kubelet code and if you want an "all-in-one" openshift experience you'll want to use "oc cluster up".
There should be no impact to end users - starting in 3.10 we already only used the kubelet (part of hyperkube binary) and use the "openshift-node-config" binary to translate the node-config.yaml into kubelet arguments. oc cluster up has been running in this configuration for a while.
integration tests have been changed to only start the master components