Disable singleton

Author: shunping

sdks/python/apache_beam/runners/portability/prism_runner.py

@@ -90,9 +90,9 @@ def default_environment(
     return super().default_environment(options)
 
   def default_job_server(self, options):
-    debug_options = options.view_as(pipeline_options.DebugOptions)
-    if not debug_options.lookup_experiment("disable_prism_server_singleton"):
-      options = self.enforce_port_singleton(options)
+    #debug_options = options.view_as(pipeline_options.DebugOptions)
+    #if not debug_options.lookup_experiment("disable_prism_server_singleton"):
+    #  options = self.enforce_port_singleton(options)
     return job_server.StopOnExitJobServer(PrismJobServer(options))
 
   def create_job_service_handle(self, job_service, options):