Apply the Fabric patch only for Python 2
Apply the Fabric patch only for Python 2

Moving the logic near the Python2/Python3 decision will make it easier
to clean-up once we don't support any old release with Python2 tests.

Changelog: None

Signed-off-by: Lluis Campos <9244cb41c39addfc5cf236920b776ea2820513d0@northern.tech>

mendersoftware/meta-mender-qemu