platform.linux_distribution() was deprecated in python 3.5 and removed in 3.8.
update to use distro.linux_distribution().
>>> import platform
>>> platform.linux_distribution()
('Ubuntu', '16.04', 'xenial')
>>> import distro
>>> distro.linux_distribution()
('Ubuntu', '16.04', 'xenial')
Change-Id: Ia8a7cd2d78fd56145cdded0b9d361a1b45bb4d27
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>