Fix typo (reintroduce lock line)

erp5/util/taskdistribution/__init__.py

@@ -107,6 +107,7 @@ class RPCRetry(object):
             default_timeout = socket.getdefaulttimeout()
             socket.setdefaulttimeout(self.timeout)
             try:
+                with self.__rpc_lock:
                     return getattr(self._proxy, func_id)(*args)
             finally:
                 socket.setdefaulttimeout(default_timeout)