Remove oslo.sphinx from global requirements

We should use oslosphinx everywhere instead.

Change-Id: I2a67abbab35fde2b7a57b80babe327530c8dbc95
Closes-Bug: #1277168
Remove obsolete python-savannaclient

All projects are now migrated to the new actual python-saharaclient, so,
we could remove the old one.

Change-Id: Ic9de0fa1da56ff1d3fef25342bed3e781378d085
Merge "Remove oslo.sphinx from global requirements"
Update python-keystoneclient to 0.7.0

A new version of keystoneclient was released containing changes we
wish to use in Horizon, so bump to the latest version.

Change-Id: I4c4a4db30108d82a56927aa9983f7736b038d435
Add ironic-python-agent to projects.txt

Ironic-python-agent is a new project under the Ironic program that
follows the global requirement guidelines.

Change-Id: I2f629a8f2987571895425585a20a53f1be850ff0