Don't log tabbott/extra test messages.

(imported from commit 8e1adecca14e5440298fd93b41e1a43da37c807f)

zephyr/models.py

@@ -418,6 +418,7 @@ def log_event(event):
     fcntl.flock(lock, fcntl.LOCK_UN)
 
 def log_message(message):
+    if not message.sending_client.name.startswith("test:"):
         log_event(message.to_log_dict())
 
 def do_send_message(message, no_log=False):