glance_api_version option is deprecated in Cinder from 11.0.0 (Pike),
so remove from Cinder configuration template.
cinder_glance_api_version is only used in the template, so it is also removed.
Change-Id: Id921bf8f7c81ce7e674f4a4b230de13e47ffe7e2
Closes-bug: #1692750