Make the test suite pass again catchiing up bzr.dev changes.

* tests/test_upload.py:
(get_transport_scenarios, load_tests): bzr.dev deleted all test
adpaters, catch up.

* tests/test_auto_upload_hook.py:
(AutoPushHookTests.test_hook_is_registered): Catch up with bzr.dev
changing the layout of self._preserved_hooks.