Updated openstack/openstack
Project: openstack/tempest  b230abff723cf758ae5eaec6eb1c4b2e9fda4f8f
null
always use sitepackages

we really don't need to be compiling lxml at 3.5 when 2.3 is good
enough. So specify that we can always use sitepackages, as well
as don't pip -U, so we use requirements as intended.

Change-Id: If9f337d6bb688d46ab68dc1276e0f499a7dec8fd