Those are remnants from the oslo-incubator times. Also, oslo.messaging
deprecated [1] transport aliases since 5.2.0+ that is the minimal
version supported for stable/newton.
[1] I314cefa5fb1803fa7e21e3e34300e5ced31bba89
Closes-Bug: #1424728
Change-Id: I50c4559ea2ebc8512a05ffad52e5f04b22743ff4