Rollback sitepackages fix for tox.ini
Rollback sitepackages fix for tox.ini

Change-Id: I47ce074255ed1691d427924b5db9edcccefe38ce

openstack/sahara-scenario,esikachev/sahara-tests,openstack/sahara-scenario,openstack/sahara-tests,openstack/sahara-tests,openstack/sahara-tests,openstack/sahara-tests,esikachev/sahara-tests,esikachev/sahara-tests,openstack/sahara-scenario