Switch Nova/Tempest to use/test Cinder API v2

As per https://blueprints.launchpad.net/cinder/+spec/deprecate-v1-api
the Cinder API v1 was designated as deprecated in Juno and was meant
to be removed in Kilo, but appears to still be usable in Kilo.

This patch configures Nova to use the Cinder v2 API instead of the
v1 API.

This patch configures Tempest to test both the Cinder v1 and v2 API's
for now. Once the API is removed upstream we can change this.

DocImpact
Closes-Bug: #1481542
Change-Id: I6513c07e1b5d5653b84ad0b2b490ac8451f2bdf1

playbooks/roles/os_nova/templates/nova.conf.j2

@@ -127,7 +127,7 @@ notification_driver = messagingv2
 
 # Cinder
 [cinder]
-catalog_info = volume:cinder:internalURL
+catalog_info = volumev2:cinderv2:internalURL
 cross_az_attach = {{ nova_cross_az_attach }}
 
 

playbooks/roles/os_tempest/templates/tempest.conf.j2

@@ -226,7 +226,7 @@ volume_size = 1
 [volume-feature-enabled]
 api_extensions = all
 api_v1 = true
-api_v2 = false
+api_v2 = true
 backup = {{ tempest_volume_backup_enabled }}
 multi_backend = false
 snapshot = false