Begin adding hooks to work discovery

Discovery will be more explicitly organized.  This should
make it easier for folks to understand and have common paths
for embracing new schemes as appropriate.  At this point
PXE, SLP, SSDP, and mDNS are likely discovery schemes, and
'location' providers would be Ethernet switches and server
blade enclosure managers.

confluent_server/confluent/core.py

@@ -98,7 +98,8 @@ def load_plugins():
                 pluginmap[plugin] = tmpmod
 
 
-rootcollections = ['noderange/', 'nodes/', 'nodegroups/', 'users/', 'events/']
+rootcollections = ['discovery/',
+                   'noderange/', 'nodes/', 'nodegroups/', 'users/', 'events/']
 
 
 class PluginRoute(object):
@@ -576,6 +577,10 @@ def handle_node_request(configmanager, inputdata, operation,
             return stripnode(passvalues[0], nodes[0])
 
 
+def handle_discovery(pathcomponents, operation, configmanager, inputdata):
+    if pathcomponents[0] == 'detected':
+        pass
+
 def handle_path(path, operation, configmanager, inputdata=None, autostrip=True):
     """Given a full path request, return an object.
 
@@ -634,5 +639,8 @@ def handle_path(path, operation, configmanager, inputdata=None, autostrip=True):
             raise exc.NotFoundException()
         if operation == 'update':
             return alerts.decode_alert(inputdata, configmanager)
+    elif pathcomponents[0] == 'discovery':
+        return handle_discovery(pathcomponents[1:], operation, configmanager,
+                                inputdata)
     else:
         raise exc.NotFoundException()