We couldn't copy to_unicode, to_bytes, to_str into module_utils because
of licensing. So once created it we had two sets of functions that did
the same things but had different implementations. To remedy that, this
change removes the ansible.utils.unicode versions of those functions.
* Can be configured in the ansible.cfg for tasks/handlers individually
* If an included filename contains no vars or loops, it will be expanded
in-place as if it were marked as static
If you convert the error string to bytes and embed it inside another
error string, you get
Prefix:
b'Embedded\nerror\nstring'
which is not what we want.
But we also don't want Unicode in error messages causing unexpected
UnicodeEncodeErrors when on Python 2.
So let's convert the error message into the native string type (bytes on
Python 2, unicode on Python 3).
