[autotest] Hide ab-version and testbed-version labels from the hosts filter

BUG=None
TEST=local instance

Change-Id: Iec350cbcb50dae3af7fdc093bb5fe9f05427fb1f
Reviewed-on: https://chromium-review.googlesource.com/333102
Commit-Ready: Dan Shi <dshi@google.com>
Tested-by: Dan Shi <dshi@google.com>
Reviewed-by: Kevin Cheng <kevcheng@chromium.org>
diff --git a/frontend/afe/rpc_interface.py b/frontend/afe/rpc_interface.py
index 2f21ecf..01ada70 100644
--- a/frontend/afe/rpc_interface.py
+++ b/frontend/afe/rpc_interface.py
@@ -1593,7 +1593,9 @@
     label_exclude_filters = [{'name__startswith': 'cros-version'},
                              {'name__startswith': 'fw-version'},
                              {'name__startswith': 'fwrw-version'},
-                             {'name__startswith': 'fwro-version'}]
+                             {'name__startswith': 'fwro-version'},
+                             {'name__startswith': 'ab-version'},
+                             {'name__startswith': 'testbed-version'}]
     result['labels'] = get_labels(
         label_exclude_filters,
         sort_by=['-platform', 'name'])