Remove app_label Meta attribute
Use get_changeform_initial_data method to prefill the site in forms
Remove now useless test for initial sites value in form
Directly assign author when creating entry
Remove black magical code for the authors management, use readonly attribut instead
Update and better testing of EntryAdmin.save_model
Update test for EntryAdmin.get_readonly_fields
Fix the tests for disposable authors
Test EntryAdmin.get_changeform_initial_data and optimize it
Remove unnecessary import