ipa module utils can not handle HA FreeIPA with Python3 #71110 (#71112)

* BUGFIX 2.9 ipa module utils can not handle HA FreeIPA with Python3

* Resolve comments on other PR

changelogs/fragments/71112-ipa-python3.yml

@@ -0,0 +1,2 @@
+bugfixes:
+   - ipa_hostgroup - fix an issue with load-balanced ipa and cookie handling with Python 3 - (https://github.com/ansible/ansible/issues/71110).

lib/ansible/module_utils/ipa.py

@@ -96,7 +96,7 @@ class IPAClient(object):
                 if status_code not in [200, 201, 204]:
                     self._fail('login', info['msg'])
 
-                self.headers = {'Cookie': resp.info().get('Set-Cookie')}
+                self.headers = {'Cookie': info.get('set-cookie')}
             except Exception as e:
                 self._fail('login', to_native(e))
         if not self.headers: