Openstackclient now installs openstacksdk.
So we must install it along with shade last if we wish
to ensure that what is in GIT or what the user has specified
is to be installed overwriting what may have been pulled in
via dependency.
Depends-On: https://review.openstack.org/596530
Change-Id: I58e19c85400a1cd860aa4b870dc6c5eaa4686eb8