Comment 10 for bug 1476770

I suspect the same root cause is to blame here. System python-requests is installed and is older. When pip installs urllib3 1.11.0 over the system version, it causes problems because requests doesn't try to anticipate the changes in future urllib3 versions considering how requests releases relative to urllib3. This also points to the fact that we're not using requests from pip even though (according to everyone I talk to) we should. We should fix the problems causing us to not use pip from requests instead of trying to make a short fix around this.