update miq compare_user group comparison (#29063)

When calling manageiq_user to an already existing user (but leaving out the password so that it doesn't automatically 're-create' the user), the module fails with:

fatal: [127.0.0.1]: FAILED! => {"changed": false, "failed": true, "module_stderr": "Shared connection to 127.0.0.1 closed.\r\n", "module_stdout": "Traceback (most recent call last):\r\n  File \"/tmp/ansible_Fr7Nt3/ansible_module_manageiq_user.py\", line 324, in <module>\r\n    main()\r\n  File \"/tmp/ansible_Fr7Nt3/ansible_module_manageiq_user.py\", line 315, in main\r\n    res_args = manageiq_user.edit_user(user, name, group, password, email)\r\n  File \"/tmp/ansible_Fr7Nt3/ansible_module_manageiq_user.py\", line 229, in edit_user\r\n    if self.compare_user(user, name, group_id, password, email):\r\n  File \"/tmp/ansible_Fr7Nt3/ansible_module_manageiq_user.py\", line 189, in compare_user\r\n    (group_id and user['group']['id'] != group_id)\r\nKeyError: 'group'\r\n", "msg": "MODULE FAILURE", "rc": 0}

The 'group' field turns out to be 'current_group_id' (at least with ManageIQ 4.6). Update the comparison accordingly.

lib/ansible/modules/remote_management/manageiq/manageiq_user.py

@@ -192,7 +192,7 @@ class ManageIQUser(object):
             (name and user['name'] != name) or
             (password is not None) or
             (email and user['email'] != email) or
-            (group_id and user['group']['id'] != group_id)
+            (group_id and user['current_group_id'] != group_id)
         )
 
         return not found_difference