Bug Report: make tests-py3 is broken in devel

[Yannig]

Ansible Version:

last devel

Ansible Configuration:

Nothing special

Environment:

Nothing special

Summary:

make tests-py3 is broken

Steps To Reproduce:

Launch make tests-py3

Expected Results:

Tests OK

Actual Results:

======================================================================
FAIL: test_sudo_only_if_user_differs (units.plugins.action.test_action.TestActionBase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/travis/build/ansible/ansible/test/units/plugins/action/test_action.py", line 52, in test_sudo_only_if_user_differs
    play_context.make_become_cmd.assert_called_once_with('ECHO', executable=None)
  File "/opt/python/3.4.2/lib/python3.4/unittest/mock.py", line 782, in assert_called_once_with
    return self.assert_called_with(*args, **kwargs)
  File "/opt/python/3.4.2/lib/python3.4/unittest/mock.py", line 771, in assert_called_with
    raise AssertionError(_error_message()) from cause
nose.proxy.AssertionError: Expected call: mock('ECHO', executable=None)
Actual call: mock(b'ECHO', executable=None)
    None = (('ECHO',), {'executable': None}) if isinstance((('ECHO',), {'executable': None}), Exception) else None
>>  raise AssertionError(_error_message()) from None

[Yannig]

The following commit broke the tests in python3: 0c013f5