Updated openstack/openstack
Project: openstack/tempest  dfd97d73a4ef9b5f69833c41bcdc71c6243aa9d8

orchestration api add test for volume retain deletion policy

Adds a test for OS::Cinder::Volume to ensure the "Retain" deletion
policy is respected on stack deletion

Change-Id: I4720ce0656d0543c1318f4c9acddc5243d94a678