removed node map file and utilities, added formal class methods to session objects and added checks for specific classes where needed

daemon/scripts/core-daemon

@@ -60,9 +60,6 @@ def cored(cfg, use_ovs):
     try:
         address = (host, port)
         server = CoreServer(address, CoreHandler, cfg)
-        if use_ovs:
-            from core.nodes.openvswitch import OVS_NODES
-            server.coreemu.update_nodes(OVS_NODES)
     except:
         logging.exception("error starting main server on:  %s:%s", host, port)
         sys.exit(1)