Importer: Fix duplicated urls
Importer uses provided URL for the "website" as default. If "sourcecode" is set to the same, this causes a lint error. For Github the website is now empty while Gitlab's sourcecode is no longer the bas project url.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Importer uses provided URL for the "website" as default. If "sourcecode" is set to the same, this causes a lint error. For Github the website is now empty while Gitlab's sourcecode is no longer the bas project url.