Kustomize controller uses the namespace of the kustomization resource
if the sourceRef is empty. However, this policy doesn't applied to
dependencies. This can be problematic if the same named `Sources`
without explicit namespace is in different namespace.
This commit fixes this issue by using kustomization's namespace when
checking dependencies if the namespace in sourceRef is empty.
Signed-off-by: Sunghoon Kang <me@hoon.dev>
Stefan Prodan
Sunghoon Kang