lifecycle: Removed obsolete FailureManager.
lifecycle: Added lifecycle interface support to IPv4.
lifecycle: Added simple IPv4 example using LifecycleController.
lifecycle: Replaced obsolete FailureManager with LifecycleController in MPLS examples.

TODO testing, extend routing protocols with handling lifecycle operations?
lifecycle: Deleted obsolete, unused MPLS failed routers.

Merged based classes into real routers.
lifecycle: Fixed MPLS examples with respect to initializing routing tables.
lifecycle: Added status modules to MPLS nodes to test failure.