3ba2c08 [tests] fix disconnect_ban intermittency (John Newbery)
Tree-SHA512: f4e1a88b4126ad5e1aa861a99f9b2589194a25610b5e18bcc196e7dccfa02491f0b9549fbb9f9a73776ed5ee2f6b8ade264b92ac378a25c1a92df4b0272487a7
Backport of Core PR10376
https://github.com/bitcoin/bitcoin/pull/10376/files