[BISERVER-11504] Making the Activator resilient to restarting
[BACKLOG-218] Add event bus to the platform and make sure it is available on the DI Server
	- implemented async event bus leveraging on google-guava's
	- subscribers and events are wrapped in top level interfaces IMonitoringEvent and IMonitoringSubscriber
	- created a 'shell/skeleton' plugin whose only function is to startup MonitoringService
[BACKLOG-252] - Updating test properties for branched projects
[BACKLOG-252] - Updating test properties for branched projects
[BACKLOG-252] - Setting the project revision to MONITORING-SNAPSHOT
[BACKLOG-394] Registering EventBus with the system
[BACKLOG-218] Add event bus to the platform and make sure it is available on the DI Server
	- added unit tests