Skips CUDA handle tests on Python2 (#29430)
Summary:
Per title. These tests aren't Python2 compatible.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29430
Differential Revision: D18391211
Pulled By: mruberry
fbshipit-source-id: a3516796f6bd333de0415dd0ff0a2a161f963109
