We want to unarchive the *archived* symlinks.
set sequencing_platform so instrument data is a valid object
allow setup_object to be called more than once

Since ProcessingProfiles have to be unique setup_object could only be
called once (using all defaults).
use test factory to create model subject

The previously created test_subject was not a valid object.
use test factory to create a valid library
sort use statements
use test factory so objects are valid