plugin XEP-0065: fixed bad error handling

src/memory/disco.py

@@ -172,7 +172,7 @@ class Discovery(object):
         @param jid_: the jid of the target server (None for profile's server)
         @param profile: %(doc_profile)s
         @return: a set of found entities
-        @raise CancelError: the request timed out
+        @raise defer.CancelledError: the request timed out
         """
         found_entities = set()