adding Swisscloud content metadata

tox.ini

@@ -0,0 +1,25 @@
+[tox]
+minversion = 3.2.0
+envlist = py3,pep8
+ignore_basepython_conflict = true
+
+[testenv]
+basepython = python3
+usedevelop = True
+setenv =
+   PYTHONWARNINGS=default::DeprecationWarning
+deps = -r{toxinidir}/test-requirements.txt
+commands = stestr run {posargs}
+
+[testenv:pep8]
+commands = flake8 {posargs}
+
+[testenv:venv]
+commands = {posargs}
+
+[flake8]
+# E123, E125 skipped as they are invalid PEP-8.
+show-source = True
+ignore = E123,E125,W503
+builtins = _
+exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build