arc: Mass PEP8 Fixes

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
.travis.yml: Add PEP8 checks

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
arc.cli.args.parser: PEP8 E712 fix

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Merge pull request #18 from autotest/travis-pep8

Travis pep8