Clusteraddresses containing "/" will not be cleared from cache when events of removal are received

[steamr-76]

Hi, we just detected this issue in our environment, and saw that the code does not behave correctly if the topics/addresses contains a "/". We were using the addresses in the form <appname>/<topic>

Rsult: When nodes goes away, the remaining nodes will still keep references to old nodes (due to failing in removing their addresses) and hence will fail to call them.

vertx-zookeeper/src/main/java/io/vertx/spi/cluster/zookeeper/impl/SubsMapHelper.java

Line 161 in 12dfa48

String[] pathElements = event.getData().getPath().split("/", 4);

A simple fix, is to avoid using "/" in the addresses.

let me know if you need more information.