We should provide an easy way to update the default config namespace of Mixer for users that don't want to use `istio-config-default`. This is blocked by changes in https://github.com/istio/istio/pull/866. <!-- Please see https://istio.io/troubleshooting/ and if you are a user of Istio, please file issues in https://github.com/istio/issues/issues instead of here Please add the correct labels and epics (and priority and milestones if you have that information) -->
We should provide an easy way to update the default config namespace of Mixer for users that don't want to use
istio-config-default.This is blocked by changes in #866.