Add tox.ini

Add initial tox.ini file for integration with OpenStack

Change-Id: I32115bed3cee3fb97fa7dc5622b8f42374e3d1d2

tox.ini

@@ -0,0 +1,34 @@
+[tox]
+minversion = 1.6
+envlist = py26,py27,py33,pypy,pep8
+skipsdist = True
+
+[testenv]
+usedevelop = True
+install_command = pip install -U {opts} {packages}
+setenv =
+   VIRTUAL_ENV={envdir}
+   LANG=en_US.UTF-8
+   LANGUAGE=en_US:en
+   LC_ALL=C
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
+commands = python setup.py testr --slowest --testr-args='{posargs}'
+
+[testenv:pep8]
+commands = flake8
+
+[testenv:venv]
+commands = {posargs}
+
+[testenv:cover]
+commands = python setup.py testr --coverage --testr-args='{posargs}'
+
+[flake8]
+# H803 skipped on purpose per list discussion.
+# E123, E125 skipped as they are invalid PEP-8.
+
+show-source = True
+ignore = E123,E125,H803
+builtins = _
+exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build