In this patch:
- adjusted VersionsController to return only v3
- removed cinder.api.v2.router
- adjustments to cinder.tests.unit.api.contrib to use /v3 only
- moved cinder.api.v2.snapshot_metadata (and tests) to cinder.api.v3
- moved cinder.api.v2.types (and view, tests) to cinder.api.v3
- updated versions response in api-ref
- removed unnecessary config option
- updated various sample config files
- removed experimental tempest-cinder-v2-api job
- updated some docs
- updated non-voting rally job config
Some cinder.api.v2 modules are left because the v3 classes depend on
them, but with the v2 router removed, these are unreachable via the
/v2 path.
Depends-on: https://review.opendev.org/c/openstack/rally-openstack/+/794891
(changes rally to use Block Storage API v3)
Depends-on: https://review.opendev.org/c/openstack/requirements/+/794894
(corrects regression in upper-constraint on Sphinx)
Change-Id: I2093d77db9beec7543c7524d2cd273e79dd5fd5d
e05b261af7