* Fixed file.close() typo in test_vault_editor
 * Updated unicode.py to redefine basestring properly in python3 and fixed a couple missed py27 specific code.
 * Realized the patch in test_data_loader was still failing cause we are passing the string 'builtins.open' and not actually using it in that file and soe instead of failing in py34 it would fail in py27.

Unfortunately, I wasn't able to fix a bug in the VaultAES in which during
the test_decrypt_1_0 and test_rekey_migration in which VaultAES wasn't successfully
writing the writing the encrypted key to out_file (BytesIO).

Added skipping vault_editor tests test_decrypt_1_0 and test_rekey_migration in python3
since I wasn't able to successfully backport VaultAES without weird bugs.

In mod_args we were checking `isinstance(thing, NoneType)` when
thing is None works the same since NoneType can't be subclassed in
python 2 or 3 and it removes the need for the NoneType import.

Existing tests pass under both versions, but there could still be some issues
since, it involves a lot of 2/3 bytes-unicode conversions.

This was to fix the `TypeError: 'str' does not support the buffer interface` errors.

NOTES:
  1. replaced unicode, str, etc with their six counterparts
  2. isinstance(obj, basestring) -> isinstance(obj, (string_types, text_type))
  3. I'm not entirely confident about the behaviour of __str__ and __unicode__ between versions
     so that might require a bit more testing.

Remove check of hardcoded AWS region list.

Add CoreOS facts detection, fix https://github.com/ansible/ansible-modul...

made certain flags part of base to make them universally settable

Fixed a few typos in the become documentation

Make some of the optional requirements optional for testing -- we'll skip the tests instead

You can extend boto to point at other regions that are defined in a
private cloud by defining ``BOTO_ENDPOINTS`` or ``endpoints_path`` in
the ``~/.boto`` file.

Ansible was doing a premature check against a hard-coded list of regions
that interrupted this possibility.  This commit removes that and
clarifies what the user can do if they specify a non-AWS region.

Prefer dnf to yum.

On Fedora 22 and later, yum is deprecated and dnf is installed by
default. However, the detection do not seems to take this in account,
and always use yum, even when yum cli is just a wrapper to tell "use
dnf", as this is the case on F22 and later ( see package dnf-yum ).

As dnf is not installed by default, except on F22, this shouldn't
break anything.

Vagrant inventory: exit 0 on success

Use abc for BaseCacheModule

Remove old dead code ( variable no longer exist, not used )

Fix errors reporting for playbook/*

Do add a unused named argument using a variable that was removed

Fix serialize function by using the right members name

Fix variable name

problem that the update fixes:

https://github.com/ansible/ansible-modules-core/issues/1064