Catch a rare timing crash.

Since their was absolutely no interest from the openIAB team to work on all the bugs and PR I do not maintain anymore my PRs.

Anyway as explained in the description, this is a very rare collision where the service is already unbinded by the timeout so will fail for this second unbind.
There's nothing to handle, do or rethrow. You can eventually be more specific on the Exception catch if you want but in all cases there's no possible recovery on any error on this.