Minor fix for xpon tcont CLI command

Change-Id: I0927c2f2de5860ca04beacbb5c24141c74f3301f
diff --git a/cli/xpon.py b/cli/xpon.py
index b6d5c03..ea16a4a 100644
--- a/cli/xpon.py
+++ b/cli/xpon.py
@@ -1537,7 +1537,7 @@
                 print_pb_list_as_table("TConts for device ID = {}:".format(
                     self.device_id), tcont, {}, self.poutput)
             else:
-                tconts = stub.AllTcontsConfigData(Empty())
+                tconts = stub.GetAllTcontsConfigData(Empty())
                 print_pb_list_as_table(
                     "TConts:", tconts.tconts_config, {}, self.poutput)
             return