tox: Update pylint to 1.5.3.

* Handle the import fallback idiom with regard to wrong-import-order.

* Decouple the displaying of reports from the displaying of messages

  Some reporters are aggregating the messages instead of displaying
  them when they are available. The actual displaying was conflatted
  in the generate_reports. Unfortunately this behaviour was flaky
  and in the case of the JSON reporter, the messages weren't shown
  at all if a file had syntax errors or if it was missing.
  In order to fix this, the aggregated messages can now be
  displayed with Reporter.display_message, while the reports are
  displayed with display_reports.

* Ignore function calls with variadic arguments without a context.

  Inferring variadic positional arguments and keyword arguments
  will result into empty Tuples and Dicts, which can lead in
  some cases to false positives with regard to no-value-for-parameter.
  In order to avoid this, until we'll have support for call context
  propagation, we're ignoring such cases if detected.

* Treat AsyncFunctionDef just like FunctionDef nodes,
  by implementing visit_asyncfunctiondef in terms of
  visit_functiondef.

* Take in account kwonlyargs when verifying that arguments
  are defined with the check_docs extension.

* Suppress reporting 'unneeded-not' inside `__ne__` methods

tox.ini

@@ -107,7 +107,7 @@ deps =
     {[testenv]deps}
     {[testenv:misc]deps}
     astroid==1.4.3
-    pylint==1.5.2
+    pylint==1.5.3
     requests==2.9.1
 commands =
     {envpython} scripts/link_pyqt.py --tox {envdir}