Leaked Consumer objects created by SyncedPublisher objects spam the logs

[rudi]

The location and cause are currently unclear. Commit 01bd5f2 added logging at the only possible location where this could occur.

[rudi]

Possible cause: eu-nebulous/exn-connector-java#3

[rudi]

Reportedly fixed by eu-nebulous/exn-connector-java@7a7e938