Neutron fwaas adding rule to policy reports Error

[Benjamin Reichel]

The command to add a firewall rule to a policy does not work anymore since version python-neutronclient-11.1.0. The example command which is broken is the following:

openstack firewall group policy add rule test allow_ssh_egress
Firewall rule {'firewall_rule_id': '8cc78463-1eed-4062-ba86-3118756cd4e9', 'insert_before': '', 'insert_after': ''} could not be found.: Client Error for url: https://api.my.favorite.cloud:9696/v2.0/fwaas/firewall_policies/0c7c9983-614b-4523-b9c7-763c1cec291e/insert_rule

The put request looks different in the newer versions:
{"firewall_rule_id": {"firewall_rule_id": "8cc78463-1eed-4062-ba86-3118756cd4e9", "insert_before": "", "insert_after": ""}, "insert_after": null, "insert_before": null}

before it was:
{"firewall_rule_id": "8cc78463-1eed-4062-ba86-3118756cd4e9", "insert_before": "", "insert_after": ""}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/python-neutronclient/+/913291