[BACKLOG-592] Remove unnecessary MonitoringService subscribers
	- Events only require to be posted to Guava's EventBus; An Event Subscriber is not required to have been registered, as event handling is done via Apache Camel's 'Guava EventBus Component'
Merge pull request #747 from pedrofvteixeira/BACKLOG-592

[BACKLOG-592] Remove unnecessary MonitoringService subscribers