When first setting up the server the service account may not yet exist

In this case trying to stop the server running as this account will
obviously fail until the setup has created this very account. Allow for
this case.

The specific error message to check for should perhaps not include
hardcoded "irods" as username, but is used in the present release in a
fixed way anyway and with few call-sites, and it makes the code somewhat
more self-explaining.

irods_testing_environment/irods_setup.py

@@ -436,8 +436,17 @@ def setup_irods_server(container, setup_input):
     from . import container_info
     from . import irods_config
 
-    if stop_irods(container) != 0:
-        logging.debug(f'[{container.name}] failed to stop iRODS server before setup')
+    try:
+        if stop_irods(container) != 0:
+            logging.debug(f'[{container.name}] failed to stop iRODS server before setup')
+    except Exception as e:
+        error_msg = f'[{container.name}] failed to stop iRODS server before setup: {str(e)}'
+        if "unable to find user irods" in str(e):
+            # If the user didn't exist at this point then the service probably wasn't started.
+           logging.debug(error_msg)
+        else:
+           logging.error(error_msg)
+           raise e
 
     ec = execute.execute_command(container, 'bash -c \'echo "{}" > /input\''.format(setup_input))
     if ec != 0: