Remove accumulated python cruft
Remove accumulated python cruft

We nolonger need or want setuptools_git installed anywhere.
get-pip no longer needs ez_setup.py first. Also, github broke
redirection on Fedora, so change the URL.

Change-Id: I16d64695bf05e672fdc12236424b62e5cd5e5dc7

open-switch/infra_puppet-jenkins,open-switch/infra_puppet-jenkins