Updated openstack/openstack
Project: openstack-dev/devstack  56a7477a7e1c4f22731a4d1bf7ab50c004b2fbce

Don't install sphinx from distro

We don't generate docs in devstack. But also, sphinx depends on babel
which has a hard depend that breaks with setuptools 8. However, pip
installed babel/sphinx should not have this problem.

Change-Id: I84a82e56f6540724d50c6201a68c480ba7645add