Duplicate check does not work for resources with different deployment source

Steps to reproduce:

1. create a process application with a dmn table
2. deploy the process application for example to jboss => a new deployment is available with deployment source "process application" and a decision definition exists with version 1
3. go to cockpit
4. do a live adjustment of the dmn table and deploy the changed dmn table => a second deployment is available with deployment source "cockpit" and a decision definition exists with version 2
5. download the latest dmn table
6. update the process application with the latest dmn table
7. re-deploy the process application => a third deployment is available with deployment source "process application" and a decision definition exists with version 3

Problem:
The decision definition with version 3 is a duplicate of the decision definition with version 2.

Expected Behavior:
When the duplicate checking is enabled and the resources does not differ (independent from deployment source), there is no new version of the definition resource.

Hint:
The duplicate check could be extended in the following way:
For each resource to deploy:

1. Get the last resource with the same name (independent from the deployment source): If it is a duplicate, then do not deploy the resource and return
2. Get the last resource with the same name and deployment source-aware: If it is duplicate, then do not deploy the resource and return
3. Otherwise deploy the resource