Switch when migrating

[stefjoosten]

During migration, there comes a point where users switch from the old functionality to the new functionality. In this project, this switch assumes that the existing system and the migration system are both operational simultaneously. Hence, the switch merely requires the ingress to redirect the traffic from the existing system to the migration system.

Task

Make a service ``switch’’, which switches the ingress from the existing application to the migration system. This service may become available to the migration engineer after the migration system is deployable. Deployable means that all existing data have been migrated and the enforce rules of the migration systems are satisfied. The test for deployability must be built also.

[stefjoosten]

This issue is implemented in issue #112.