See previous commit for context: which had to fix
commit_from_wrong_partition this way because without `logger.disabled =
False` logging could not produce its output under Python 3.6.

Discussion1: https://github.com/zopefoundation/ZODB/pull/360#pullrequestreview-936832062
Discussion2: https://github.com/zopefoundation/ZODB/pull/360#issuecomment-1093710722