[FIX] test_pylint: incompatibility between pylint 1.6 and python 3.6

reference: https://github.com/PyCQA/pylint/issues/1349

pylint 1.6 and python 3.5 (and below) should work fine, so no need to
force people to upgrade there.

odoo/addons/test_pylint/tests/test_pylint.py

@@ -10,6 +10,7 @@ import subprocess
 from distutils.version import LooseVersion
 import os
 from os.path import join
+import sys
 
 from odoo.tests.common import TransactionCase
 from odoo import tools
@@ -114,8 +115,11 @@ class TestPyLint(TransactionCase):
     def test_pylint(self):
         if pylint is None:
             self._skip_test('please install pylint')
-        if LooseVersion(getattr(pylint, '__version__', '0.0.1')) < LooseVersion('1.6.4'):
-            self._skip_test('please upgrade pylint to >= 1.6.4')
+        required_pylint_version = LooseVersion('1.6.4')
+        if sys.version_info >= (3, 6):
+            required_pylint_version = LooseVersion('1.7.0')
+        if LooseVersion(getattr(pylint, '__version__', '0.0.1')) < required_pylint_version:
+            self._skip_test('please upgrade pylint to >= %s' % required_pylint_version)
 
         paths = [tools.config['root_path']]
         for module in get_modules():