Basically the changes imply that:
- For some tests that are using reflection, we need to ensure
that the backup controller is passed.
- And, whenever used explicitly in tests, it has to be destroyed.
(note that this leaves out tests running get_package(), because
that method now instantiates and destroys the controller by itself.
only tests that get a controller need to destroy it).
- Move from some old functions to the new ones introduced in the issue.
