Updated openstack/openstack
Project: openstack-dev/devstack  b3ae835d7cd898ff6e723405df64c6e370dc0fa4

don't install boto from packages

installing boto from packages pins some other pure python libraries
(like requests) in an unexpected way. As this is pure python we should
instead let this be install from pip and thus be controlled by global
requirements.

Change-Id: If5df9de8c3e1ad8faceab4b43c86134dbbc55a51