update pod.json for new internal command and update router cmd descripti...

Updates for https://github.com/openshift/origin/pull/376, optional integration with e2e test to curl the route instead of direct to the pod.  Documentation update
@smarterclayton should this be configurable/optional in e2e?  I added the check just in case but I think a good argument can be made that the router test verifies the front end so it should be the default test.