pylint: upgrade to 1.4.0

pylint: upgrade to 1.4.0

This is largely a bugfix release, so should be much easier to transition.

BUG=chromium:431514
TEST=ran on some code bases and checked output

[vapier, 2014-12-03 06:59:51]

vapier@chromium.org changed reviewers:
+ agable@chromium.org, chrisha@chromium.org, kbr@chromium.org,
maruel@chromium.org, yyanagisawa@google.com

[vapier, 2014-12-03 06:59:52]

let's see if i can lgtm this myself since i got it in
https://codereview.chromium.org/753543006 already ...

[vapier, 2014-12-03 07:08:24]

The CQ bit was checked by vapier@chromium.org

[commit-bot: I haz the power, 2014-12-03 07:08:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/776883002/1

[commit-bot: I haz the power, 2014-12-03 07:08:50]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-12-03 07:08:51]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[vapier, 2014-12-11 21:47:54]

the original git one worked fine.  the existing tests were just flaky on the
bots.