Add "ShutdownInProgress" event to the ServiceContainer.TerminateListener

Currently the ServiceContainer.TerminateListener only notifies the listener after all the services are down notifying that Server is completely shutdown, However, it would be beneficial for services that are listening to event to get notified when the server is starting the shutdown cycle and after it completes.

usecase: in Teiid we differentiate between a undeploy event because of the undeploy, undeploy due to the shutdown to clean up cache entries, currently I see no way differentiate between two.