[skeleton] Don't use system site packages in tox environment
As we changed this in cubicweb, there is a consensus that this
is not the best practice so let us change it as well for
skeleton.
--- a/cubicweb/skeleton/tox.ini.tmpl Wed Mar 22 14:38:10 2017 +0100
+++ b/cubicweb/skeleton/tox.ini.tmpl Thu Mar 23 10:30:48 2017 +0100
@@ -2,7 +2,6 @@
envlist = py27,py34,flake8
[testenv]
-sitepackages = true
deps =
pytest
commands =