Updated openstack/openstack
Project: openstack-infra/devstack-gate  e0a3851a8ca4ce00538f39913ecabf00f2296b12
null
Add cliff, pycadf, stevefore & taskflow

Oslo has adopted 4 libraries that were previously on
stackforge, so we can now install them from source.
Add those 4, and alphabetize the libraries that were
already present.

Change-Id: I6b6e20a7884b47ade466fc38641a5ac1a5f3e146