3scale operator rewrites three configuration files for system/porta through injecting them from the system ConfigMap to /opt/system-extra-configs path:

• zync.yml
• service_discovery.yml
• rolling_updates.yml

This can be avoided, because these files are already included in the productized system image.

In case of `zync.yml` some changes need to be done first - specifically, the operator needs to update the value of the environment variable ZYNC_ENDPOINT, because this is what the operator actually changes (depending on whether zync is enabled or not in the CR).

For service_discovery.yml there is no need to include it through the operator, as the baked-in version has the same config for the production enviornment.

As for rolling_updates.yml, it needs to be verified whether the configuration is actually exactly the same, or to update the config in the porta upstream code to be the same as the one set by operator, so this customization can be removed also.