Skip a test that doesn't apply to Python 3
Skip a test that doesn't apply to Python 3

This test is checking behavior that seems to have been specific to the
carbon package from PyPI. Since this is a Python 2-only module, and has
deps that do not exist on Python 3, it should not be run on Python 3.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt