Don't pass --create-namespace to helm
Don't pass --create-namespace to helm

It isn't in helm 3.0, the version we use. I've
manually created it for now - we should upgrade helm.

berkeley-dsep-infra/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub,ryanlovett/datahub