In test_compact06, we do:

        self.session.compact(None, 'background=true')

        # Need to pause to make sure the signal sent to the background compaction server has been
        # processed.
        time.sleep(2)

We should wait for the stat background_compact_running to be set to 1 instead of sleeping and hoping it has been enabled.

Furthermore, test_compact08 has been removed, we could rename test_compact09 to test_compact08.