Fix manifest rewritten in error during apply (#3321)
Fix manifest rewritten in error during apply (#3321)

`yaml.Unmarshal` is not replacing content of output, it's merging it with `src`.  Plus placing `o` in the scope outside of the loop isn't doing anything.  Making it in the same scope as the applying loop.
kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow