Currently the DS passwords (internaldb and replicationdb) are stored in instance-wide password.conf, but the DS connection settings (e.g. hostname, port) are stored in subsystem-specific CS.cfg. That means that although each subsystem can use different DS instances, they have to use the same password.

Possible solution:
1. Move internaldb and replicationdb passwords into subsystem-specific password.conf. This will allow each subsystem in shared instance to use different passwords for different DS instances.
2. Move internaldb and replicationdb connection settings into instance-wide configuration file. This will require all subsystems in shared instance to share the same DS instance.

Proposed milestone: 10.3.