Fix adequate check on inadequate IMMs

confluent_server/confluent/discovery/handlers/imm.py

@@ -25,7 +25,7 @@ class NodeHandler(bmchandler.NodeHandler):
     def adequate(cls, info):
         # We can sometimes receive a partially initialized SLP packet
         # This is not adequate for being satisfied
-        return bool(info['attributes'])
+        return bool(info.get('attributes', {}))
 
     def scan(self):
         slpattrs = self.info.get('attributes', {})