OPENIG-201 Heaplets are never notified about their destruction
* Hooked in the GatewayServlet for destroy notification that is propagated to the Heap objects

git-svn-id: https://svn.forgerock.org/openig@366 dbb9e58e-28e6-4ce0-90e8-f11d9605b710
OPENIG-198 OpenIG container doesn't shutdown
* Force the shutdown of the fedlet when the heap is destroyed (when the web-app is stopped)

git-svn-id: https://svn.forgerock.org/openig@367 dbb9e58e-28e6-4ce0-90e8-f11d9605b710
Fixed missing javadoc comment

git-svn-id: https://svn.forgerock.org/openig@368 dbb9e58e-28e6-4ce0-90e8-f11d9605b710