Updated from global requirements

Change-Id: If1de34be01f00db55b239fb34cc04b04190d8d8d
Remove tox locale overrides

* tox.ini: The LANG, LANGUAGE and LC_ALL environment overrides were
introduced originally during the testr migration in an attempt to be
conservative about the possibility that locale settings in the
calling environment could cause consistency problems for test runs.
In actuality, this should be unnecessary and any place where it does
cause issues ought to be considered an actual bug. Also, having
these in the configuration actively causes older pip to have
problems with non-ASCII content in some package metadata files under
Python 3, so drop it now.

Change-Id: Icbda572a3c99185fef7a578a5b20db98459cc575
Closes-Bug: #1277495
Merge "Updated from global requirements"