Restore old content of reference/index.rst
Restore old content of reference/index.rst

Change-Id: Ibae00fb642099c57dec6ca118c20795a70a83980
Story: 2001980
Task: 23110

openstack/python-monascaclient,stackforge/python-monascaclient,stackforge/python-monascaclient,openstack/python-monascaclient