utils/run_pylint.py: update to latest version on virt-test repo

Signed-off-by: Cleber Rosa <crosa@redhat.com>
utils/check_patch.py: update to latest (unified version) from virt-test

This patch brings the unified version of the script to the autotest
repo.

Signed-off-by: Cleber Rosa <crosa@redhat.com>