Linking exposed dataset to a project does not assign Accession number to project

[vildead]

This is rather edge case:

1. create dataset without specifying owning project
2. expose dataset - dataset has now accession number
3. edit dataset -> assign project

Issues:

• Accessing Django admin page of the project takes quite some time (database issue?)
• The project does not have ID assigned

Solutions/Suggestions:
a) Assign ID already when creating an object in DAISY (no only on exposure). This puts more load on the id-service.
b) Do not allow exposing dataset which is not linked to a project. With current process, this seems to be meaningful as dataset metadata should be complete (including project metadata)
c) Ensure the ID is assigned upon this action.