[scripts][worker] Use setsocket_optstring when configuring with string parameter

beat/core/scripts/worker.py

@@ -138,7 +138,7 @@ def connect_to_scheduler(address, name):
     # Starts our 0MQ server
     context = zmq.Context()
     socket = context.socket(zmq.DEALER)
-    socket.setsockopt(zmq.IDENTITY, name)
+    socket.setsockopt_string(zmq.IDENTITY, name)
 
     if address.find('://') < 0:
         address = 'tcp://' + address