Revert "Pass environment variables of proxy to tox"
Revert "Pass environment variables of proxy to tox"

It looks like you can work around this problem by setting an environment variable on your dev system. See https://tox.readthedocs.org/en/latest/config.html#confval-passenv=SPACE-SEPARATED-GLOBNAMES

This reverts commit fff86fa54651f503aa1dedafbf6ee69dc1116a9a.

Change-Id: Ibe6654f7a30360b49ce8826101c3d3f5addb060a

openstack/oslo.log