Add logging to the new #openstack-sahara channel

Savanna project is now in the process of renaming to Sahara due to the
potenial trademark issues. Channel was registered and OpenStack added to
founders with all needed permissions.

Change-Id: I6183d14947e8a34d7fe8ba7a3a9669df7200512f
Merge "Add logging to the new #openstack-sahara channel"