Updated openstack/openstack
Project: openstack/sahara  90abb93ded648542d6965c0e08c2668994229fc0

Updating documentation for overview/details

Sahara communicates with the following services:
Heat, Cinder, Neutron and Ceilometer
These services are documented in rationale/details section.

Change-Id: I0d88397c02742e111b46ab525b489f8b8dbd29c4
Closes-Bug: #1350063
backport: none