LIBTD-1425: Compel Seamus admin_set_id cleanup
Addition to the seamus cleanup scripts to set all works to be part of the default admin set.
This assumes that the other import scripts have been run already. For example:
bin/rake seamus:import_authors["input.xml"]
bin/rake seamus:import_items["input.xml"]
bin/rake seamus:cleanup_users
Then, you can run the modified task:
bin/rake seamus:cleanup_works