[databases][tests] Fix cleanup after successfull creation test

beat/web/databases/tests.py

@@ -131,6 +131,7 @@ class DatabaseCreationAPI(DatabaseAPIBase):
         databases = Database.objects.all()
         self.assertEqual(databases.count(), 1)
         databases.delete()
+        dataformat.delete()
 
 
 class DatabaseRetrievalAPI(DatabaseAPIBase):