Created a new ApplicationContext frontend for the LDP4j application
kernel, together with lifecycle management capabilities:
LDP4j application configuration, LDP4j application initialization,
LDP4j application shutdown, and LDP4j application kernel configuration.

Cleaned up the new LDP4j server frontend using the new
ApplicationContext frontend from the LDP4j application kernel; in
addition new lifecycle management mechanisms for bootstrapping and
shutting down the server have been implemented.