Documentation on the use of the oslo-config-generator
Documentation on the use of the oslo-config-generator

Describe the entry points of the oslo.service library for the oslo.config generator.

Change-Id: I88016e24bd982bfe56c5eb7f9528eb8acbb73a14
Closes-Bug: 1469066

citrix-openstack-build/oslo.service,openstack/oslo.service,poznyakandrey/oslo.service