Brian Haley 08a60f7483 Remove usage of six.add_metaclass
With python 3.x, classes can use the metaclass= logic
to not require usage of the six library.

One step in removing all of six usage from neutron.

Change-Id: I2f815e412d9a96eb5faf2b3bb3a1e393a9db9309
2020-05-21 14:41:18 -04:00
..
2019-04-04 14:10:26 -06:00
2015-07-09 17:33:17 +00:00
2020-05-21 14:41:18 -04:00
2020-05-21 14:41:18 -04:00