run_pylint: Include pep8 checks if available

Signed-off-by: Chris Evich <cevich@redhat.com>
dockertest: small docstring & pep8 style cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
travis: Customized rules for pylint + pep8 checks

*  There's no need to pep8 check any unittests.
*  pylint ignore rules are different for unittests,
   dockertest modules, and test modules.
*  Pylint should only ignore TODO/FIXME warnings,
   all other warnings are just as good as errors.
*  It's handy to have the full path to each file
   being checked, since esp. test class names
   can and do clash.
*  Report total non-warning failures at end
   along with non-zero exit.

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/diff: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/dockerimport: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/info: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/run: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/tag: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/top: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/wait: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_daemon/network: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_daemon/tls: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
dockertest.docker_daemon: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
dockertest.networking: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
dockertest.version: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/events: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/ps_size: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/psa: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/rm: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>
docker_cli/rmi: Pylint/pep8 cleanups

Signed-off-by: Chris Evich <cevich@redhat.com>