0.17.0 which was released today (03/26/2021) breaks ansible-lint execution with
py2.7.
From https://pypi.org/project/ruamel.yaml we can read:
> The 0.16.13 release was the last that will tested to be working on Python 2.7.
Let's enforce the version on 0.16.13 when running with py2.7
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>