Is there any way to apply a helm chart to existing resources? 

Eg: I have already created a namespace manually and now I want to "helmify" it. But when I add a new template file to my chart and run `helm upgrade` I get an error:

`Error: UPGRADE FAILED: no Namespace with the name "ingress-haproxy" found`

I saw this issue but it's not very helpful: <https://github.com/kubernetes/helm/issues/1999>