Cinder V3: Add volume transfers support #1868
Description
Cinder supports a volume transfer call to move volumes between projects.
https://github.com/openstack/cinder/blob/e921b3ae6c462f5f844485f7da7164e194efd00c/cinder/db/sqlalchemy/api.py#L5514..L5645
https://github.com/openstack/cinder/blob/e921b3ae6c462f5f844485f7da7164e194efd00c/cinder/transfer/api.py
https://github.com/openstack/cinder/blob/e921b3ae6c462f5f844485f7da7164e194efd00c/cinder/api/contrib/volume_transfer.py
https://github.com/openstack/cinder/blob/ee9cf8696794824a7b39cd5d78a978fe31190db2/cinder/api/views/transfers.py