Set the environment variable PYTHONHASHSEED to 0 to have
predictive tests under Python 3.

Change-Id: Ia15a9383e0f20bd0e4572e9f9b9772f1704dff86

* 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: I6be8e42167191096b16d0f16e8c89e85aeedd74c
Closes-Bug: #1277495

H306 - module imports should be in alphabetical order

Change-Id: I1f8fc25b0e6ca23c21c90bda420f42a45141c2e2

Reasons:
 - tox update v1.6

Changes:
 - tox 1.6 allows us to skip the sdist step, which is slow.
 - It also allows us to override the install line. In this case, it's
   important as it allows us to stop getting pre-release software we
   weren't asking for.

Original patch by Monty Taylor, talked about here:
http://lists.openstack.org/pipermail/openstack-dev/2013-September/015495.html

Change-Id: Idbf8e08383232ae0af5b245c1abe91a7f852bfcf

This is a precursor to having them run under check and gate.

Change-Id: I9c2f8218f457aeaa03e06b4a87554fcdc40e4a0a

Change-Id: I2e2bd3a38458e1307bcc0410da74dc76c0a5987a

This adds 'build' to the exclude list for flake8

Fixes bug 1198329

Change-Id: Ia662f93db6c86c0aedfbc44632a56cd8667df469

Instead of globally ignoring pyflakes and
hacking warnings, only blacklist those that trigger
very frequently so far, in order to clean them
up in followup commits. Fix and start gating
on the rest already.

Change-Id: Ied7c7250061e3bf379e8286e8ce3b9e4af817faf