Syskit does not validate that a deployment on disk is the one declared in the orogen file

If two orogen packages define deployments with the same name, and if the Syskit configuration only loads one of the two projects (think: live and simulation packages), then:
- on disk, the last installed deployment will be the actual deployment used by Syskit
- Syskit won't notice until the tasks within the deployment have missing properties/ports (the task model is not checked either)