install_venv: apply eventlet patch correctly with python 2.7 (#890461)
install_venv: apply eventlet patch correctly with python 2.7 (#890461)

Looks like the fix for #884915 only works with RHEL6. Make it work
correctly on Fedora 16.

Change-Id: I8c996f20d49db688fd8e692bcd836dee693d362a

zancas/hacking,zancas/hacking,emonty/oslo-hacking,openstack-dev/hacking,openstack-dev/hacking,hyakuhei/cleantox,hyakuhei/cleantox,emonty/oslo-hacking