Improve python 2/3 ABC fallback for pylint. (#31848)

* Improve python 2/3 ABC fallback for pylint.
* Allow longer method names in ansible-test.

test/runner/lib/util.py

@@ -2,7 +2,6 @@
 
 from __future__ import absolute_import, print_function
 
-import abc
 import errno
 import inspect
 import os
@@ -14,7 +13,11 @@ import re
 import sys
 import time
 
-ABC = abc.ABCMeta('ABC', (object,), {'__slots__': ()})  # compatible with Python 2 *and* 3
+try:
+    from abc import ABC
+except ImportError:
+    from abc import ABCMeta
+    ABC = ABCMeta('ABC', (), {})
 
 
 def is_shippable():

test/sanity/code-smell/pylint-ansible-test.sh

@@ -6,6 +6,7 @@ pylint --max-line-length=160 --reports=n ./*.py ./*/*.py ./*/*/*.py \
     --jobs 2 \
     --rcfile /dev/null \
     --function-rgx '[a-z_][a-z0-9_]{2,40}$' \
+    --method-rgx '[a-z_][a-z0-9_]{2,40}$' \
     -d unused-import \
     -d too-few-public-methods \
     -d too-many-arguments \