873beca6d [tests] Rename NodeConn and NodeConnCB (John Newbery)
Pull request description:
Final step in #11518
NodeConn -> P2PConnection
NodeConnCB -> P2PInterface
This is basically just a rename. Should be an easy review.
Tree-SHA512: fe1204b2b3d8182c5e324ffa7cb4099a47ef8536380e0bb9d37a5fccf76a24f548d1f1a7988ab8f830986a3058b670696de3fc891af5e5f75dbeb4e3273005d7