Fix issues with ironware modules (#33068)

- authorize was not working as expected
 - use end command to get to exec context instead of exit
 - error due to mishandling of global variable _DEVICE_CONFIG

lib/ansible/modules/network/ironware/ironware_config.py

@@ -228,7 +228,7 @@ def run(module, result):
     if result['changed'] or module.params['save_when'] == 'always':
         result['changed'] = True
         if not module.check_mode:
-            cmd = {'command': 'write memory', 'output': 'text'}
+            cmd = {'command': 'write memory'}
             run_commands(module, [cmd])