docker: Pylint and pep8 fixes

no code changes, just style updates.

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
docker: Add .travis.yml file fo Travis CI

This file configures the Travis CI to check pylint, pep8 and run all
unittests for each pull request/push

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
docker: Disable autotest-0.17 pylint failures

docker-test is dependent on not yet released autotest-0.17. Disable
locally the pylint failures caused by unsupported parts from
autotest-0.16 with proper message to allow Travis CI testing.

Remove this patch when autotest-0.17 is in:
http://ppa.launchpad.net/lmr/autotest/ubuntu

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>