Consider new event CurrentJobSchedulerChanged

Current Situation

• We assume we have a Passive Cluster where only one Cluster member can be active.
• The active Cluster member is the current JobScheduler Master which responses information for JOC Cockpit.
• If a new Cluster member goes active then the new event CurrentJobSchedulerChanged is created with JOC-227
• the new Cluster member should have the same inventory but it is not necessary so that every view in JOC Cockpit has to be updated when the CurrentJobSchedulerChanged event is created

Desired Behavior

• If the ./events web service response contains the CurrentJobSchedulerChanged event then the current view has to be updated completly (incl. tree and so on).
• Other events which require an update of the view too can be ignored.