008810dfbd
Oslo.messaging uses the transport_url to represent the rpc and notification messaging driver to use and its full configuration. The rpc_backend configuration option is deprecated for removal and should not gate oslo.messaging driver configuration options. This patch: * deprecate rpc_backend * remove conditional check * update spec tests * add release note Change-Id: I5bac059b9c06b691a140a6c7c28c766ec66c1bd9 Closes-Bug: #1708976