[queens] Switch to internal cinder endpoint

Nova gets cinder endpoint URL from configuration file since the following
blueprint hasn't been fully completed (cinder part has got deferred to Rocky):
https://blueprints.launchpad.net/nova/+spec/use-ksa-adapter-for-endpoints

Change-Id: I87c23f396eb346b342c3e5097df6a2798ebd78ac
1 file changed