994ddd79c7
Python 3 deprecated the logger.warn method, see: https://docs.python.org/3/library/logging.html#logging.warning so we prefer to use warning to avoid DeprecationWarning. In addition to this there will be a hacking rule to prevent this (https://review.openstack.org/#/c/262257/) TrivialFix Change-Id: Iec8499951cd10a910a4d8ecdac95f5bb53a2e86e