Currently UserConnectedEvent is only executed locally and, only under certain conditions, on other cluster nodes. It was done so for performance reasons nowadays it'd be OK to fire it across the cluster.

It should be executed always. As such:

• it should be made Serializable with dedicated setters/getters for JID
• cluster event firing should be removed from tigase.cluster.strategy.DefaultClusteringStrategy.UserConnectedCommand#executeCommand and tigase.server.cluster.strategy.cmd.UserConnectedCmd#executeCommand